Kayla began a science experiment with 18 grams of an unknown solid. During the experiment, the change in the mass of the solid was – 7 grams. What was the mass of the solid at the end of the experiment? To solve the problem, Edna subtracted 18–( – 7) and came up with an answer of 25 grams. Is Edna correct? Why or why not?

Answers

Answer 1

Answer:

No. Enda should have added 18+ (-7) because she needed to add the initial mass and the change in mass.

Step-by-step explanation:


Related Questions

How far can a cheetah run in 2 hours at a speed of 40 miles/hour?

Answers

eighty miles in 2 hours

4. A triangle has sides of length 7, 10, and s. Write an equation representing the perimeter P of the triangle.​

Answers

Answer:dam I got the same thing

Step-by-step explanation:

By the way this Brandon

Round 1,217 to the nearest thousand.

Answers

Answer:

1,000

Step-by-step explanation:

if it's past 1500 or in 1500 it would fall to 2000

but like it's less then 1,500 then it falls to 1000

hopefully it's right

Geo has twice as many video games as Brianna has. Subtracting 7 from the number of video games. Geo has and dividing by 3 equals the number of video games Jamaal has. If Jamaal has 25 , how many video games does Brianna have

Answers

Answer:

41 games ( Brianna Has)

Geo has 82 because 25x25 equals 75 and 75+7 equals 82.

Answer:

Brianna Has  41 games  

Step-by-step explanation:

Please select the word from the list that best fits the definition

comes from a specific place

Answers

Point-source pollution, I took the test.

Answer:

Point-source pollution

Step-by-step explanation:

what is the factor of 2x2 - 5x - 12???
hurry up guyss pleaseee!

Answers

Step 1:

[tex]2 {x}^{2} - 5x - 12[/tex]

Step 2:

[tex]2 {x}^{2} - 8x + 3x - 12[/tex]

Step 3:

[tex]2x(x - 4) + 3(x - 4)[/tex]

Step 4:

[tex]\blue{(x - 4)(2x + 3)}[/tex]

You want to build a small square patio out of one-foot square concrete slabs. Home Depot delivered 80 slabs to your home. Without cutting any of the slabs, what is the largest square patio you are able to build? Its dimensions will be feet by feet. Will you have any slabs left over? If so, how many? There will be slabs left over.

Answers

Answer:

Without cutting any of the slabs, what is the largest square patio you are able to build?

8 ft x 8 ft = 64 ft²

Will you have any slabs left over? If so, how many?

yes, I will have 16 slabs left over

Step-by-step explanation:

to find the largest square patio just calculate √80 = 8.94. Since you cannot cut the slabs, then the sides must be 8 x 8 = 64 slabs

if you had just one more slab, then you could have built a 9 by 9 square patio (√81 = 9)

PLEASE HELP AND QUICK!!!

Answers

Answer:

A

Step-by-step explanation:

dude trust me

(PLEASE HELP!) The probability of drawing a pink marble from a bag containing these marbles is 3/10.
If you replace the marble each time, predict how many times a pink marble will be chosen out of 100 draws.

Answers

Answer:

30

Step-by-step explanation:

The mean is equal to the number of trials times the probability.

x = (3/10) (100)

x = 30

We expect to draw a pink marble 30 times.

write a system of linear inequalities represented by the graph​

Answers

The answer is number 3

To make lemonade, you need 6 lemons and 8 cups of water. How many lemons do you need if you had 24 cups of water?

Answers

Final Answer: 18 lemons

Explanation:

8 x 3 = 24

In order to find how many lemons you need, you need to multiply the amount of lemons by 3 as well.

6 x 3 = 18

Therefore, you need 18 lemons. :)

What's the solution: 7x = 5x - 25 + 30

Answers

Answer:

[tex]x= \frac{5}{2}[/tex]

Step-by-step explanation:

1) First, Simplify 5x-25+30 to 5x+5.

7x = 5x + 5

2) You then Subtract 5x from both sides.

7x − 5x = 5

3) Simplify 7x-5x to 2x.

2x = 5

4) Lastly,  Divide both sides by 2.

[tex]x=\frac{5}{2}[/tex]

Decimal Form: 2.5

Answer:

X= 5/2

Step-by-step explanation:

7x=5x-25+30

_5x -5x

2x=-25+30

2x=5

/2. /2

x=5/2

pls answer for points

Answers

Answer:

Step-by-step explanation:

5/6 - (2/5 + 1/3)

25/30 - (12/30 + 10/30)

25/30 - 22/30 = 3/30 = 1/10

answer is b

Please please please please help

Answers

Answer:

y=1

Step-by-step explanation:

Answer:

y=1 I not the greatest at math but I am 100% sure this is correct. :)

Julie bought $8.64 worth of 57-cent stamps and 30-cent stamps. The number of 30-cent stamps was 6 less than the number of 57-cent stamps. Solve the equation 0.57 s + 0.3 ( s − 6 ) = 8.64 for s , to find the number of 57-cent stamps that Julie bought.

Answers

Answer:

The number of 57-cent stamps that Julie bought is 12

Step-by-step explanation:

Given equation

0.57 s + 0.3 ( s − 6 ) = 8.64

Open bracket

0.57s + 0.3s - 1.8 = 8.64

Collect like terms

0.87s = 8.64 + 1.8

0.87s = 10.44

Divide both sides by 0.87

s = 12

The number of 57-cent stamps that Julie bought is 12

what is 0.16 to 4 significant figures?​

Answers

Answer:

0.1600

Step-by-step explanation:

because it would round to the closest number which is 0.1600

Find the real solution for:
p^3 = 125
A. p = 3
B. p = -3
C. p = 6
D. p = -6
Or none of the above

Answers

Answer:

none of the above

Step-by-step explanation:

p^3 = 125

Rewrite 125 as 5^3

p^3 = 5^3

Take the cube root of each side

(p^3) ^ (1/3) = ( 5^3) ^ (1/3)

p = 3

Rectangle ABCD is similar to Rectangle WXYZ . The area of ABCD is 30 square inches. Explain how to find the area, x , of WXYZ. AD/WZ = 1/2 AB/WX = 1/2 Because the ratio of the corresponding side lengths is 1/2, the ratio of the areas is equal to (__/__) to the second power. To find the area, solve the proportion 30/x = __/__ to get x = ___.

Answers

Answer:

120 square inches

Step-by-step explanation:

From the above question, we are told that:

Rectangle ABCD is similar to Rectangle WXYZ .

The area of ABCD is 30 square inches.

We are also given the ratio of their side length = 1/2

To the find the area of the second rectangle, the scale factor = k² is required where:

k = ratio of the side lengths

Let us represent the area of the.secind Rectangle as = x

Because the ratio of the corresponding side lengths is 1/2, the ratio of the areas is equal to (1/2 ) to the second power.

Hence

30/x = k²

30/x = (1/2)²

30/x = 1/4

We cross Multiply

= 30 × 4 = x

x = 120 square inches.

Therefore, the area of Rectangle WXYZ is 120 square inches.

A bird leaves its nest and travels 15 miles per hour downwind for x hours. On the return trip, the bird travels 3 miles per hour slower and has 2 miles left after x hours.

Answers

Answer:d = distance down wind d - 5 = distance back time = distance ÷ speed x = d/18 x = (d - 5)/(15)

so d/18 = (d - 5)/15. Cross multiply 18d - 120 = 15d = 40-120 = -5d 24 = d so the whole trip assuming the bird gets back to the starting point is 48 miles..

Step-by-step explanation:

PLEASE HELP! WILL MARK BRAINLIEST

Answers

Oh sorry about that im a 6th grader my older sister is in 7th but wish you luck on your quiz!

Multiply. −2⋅(4)⋅(−3)⋅(5) −120 −4 4 120

Answers

Answer:

-44120

Step-by-step explanation:

7w+7=-4+4w+23 what is this?

Answers

Answer: 7w+7=-4+4w+23 = W = 4

First you have to simplify the equations

7w+7= (4w) + (-4+23) 7w+7= 4w+19

Than you have to subtract the 4w (both equation)

7w+7-4w =4w = 4w + 19 - 4w = 3w+7= 19

And than you have to subtract the sevens

3w+7-7=19-7=3w=12

than divide by 3

3w/3 equals 12/3w=4

Question !
Qa/ 4.2 - 1.5² +0.3 x0.7​

Answers

Step-by-step explanation:

8x+8−3(x+4)−7(2−x)

8x+8−(3x+12)−7(2−x)

8x+8−(3x+12)−(14−7x)

8x+8−3x−12−14+7x

(8x−3x+7x)+(8−12−14)

12x-18

Ann Carlyle is planning a business trip for which she needs to rent a car. The car rental company charges $50 per day plus $0.80 per mile over 100 miles. Suppose Ms. Carlyle rents the car for 5 days and drives 200 miles.

Answers

Answer:

The answer is 410

Step-by-step explanation:

You have to times 50 by 5 then 0.80 times 200 then add them i hope its right <3

Which of these numbers is irrational? O A. - 5 9 O B. 1.618 C. 43 O D. VO​

Answers

Answer:

D) [tex]\sqrt{6}[/tex]

Irrational numbers are numbers that cannot be expressed in the form of p/q where q is not equal to zero.

Here is how to understand if a number irrational or not:

Irrational numbers will have decimal expansions which are non-terminating and non-recurring (no pattern or repetition o certain groups of numbers couldn't be observed and the decimal expansion will not ever end)

EXAMPLE: For non-recurring and non- terminating decimal expansions.

2.258755655554517144516517849616128478462131...................76.2879485165886225568656559781230414746108....................4987.251484561515484513184964989494555121266....................

In the above examples, it can be observed that all the decimal digits had no pattern and they will never end.

In this question, the answer is root 6. but it is not necessary that we have to find the decimal expansion, but we ccanfind it easily just by findinf if the given number is a perfect square or not.

EXAMPLE:

[tex]\sqrt{4}[/tex] is a rational number as 4 is a perfect square.[tex]\sqrt{100}[/tex] is a rational number as 100 is a perfect square.[tex]\sqrt{8}[/tex] is not a rational number as 8 is not a perfect square

Is √3,600 rational? Or a perfect square

Answers

Answer:

Yes to both

Step-by-step explanation:

In pretty sure it’s rational

Someone plz help with e and f I’ll mark as a brainliest

Answers

e: On e the 2 angles are the same degree so to find x, do 78+32 which equals 110; so x=110*

f: on f they are the same again so use this equation; 2h+44=126
subtract 44 from both sides
2h=82, then divide both sides by 2
h=41

Answer:

e.) 110 = x

f .) 41 = h

Step-by-step explanation:

e

*vertical angles are congruent

78=x-32

+32 +32

110 = x

f

* alternate exterior angles are congruent

126 = 2h + 44

-44 -44

82 = 2h (divide both sides by 2)

41 = h

I just want to know the word please.​

Answers

the word is slope i believe

Solve for x
I
(2x +1)° (5x +50°

Answers

Answer:

5 x + 1

Step-by-step explanation:

5 × + 50°

Any non - zero expression raised to the power of 0 equals 1

5 x + 1

Answer:

x = 12

Step-by-step explanation:

The sum of interior angles in a triangle is equal to 180°

since this is a right triangle

90° + 2x + 1 + 5x + 5 = 180° add like terms

7x + 96 = 180 subtract 96 from both sides

7x = 84 divide both sides by 7

x = 12

A city planner wants to build a bridge across a lake in the park. To find the length of the bridge, he makes a right triangle with one leg and the hypotenuse on land and the bridge as the other leg. The length of the hypotenuse is 340 feet and the other leg is 160 feet. Find the length of the bridge

Answers

Answer:

The length of the bridge is 300 feet.

Step-by-step explanation:

Let A represent the length of one leg.

Let B represent the length of the other leg (i.e length of the bridge)

Let C represent the length of the Hypothenus.

From the question given above, the following data were obtained:

Length of Hypothenus (C) = 340 feet.

Length of one leg (A) = 160 feet.

Length of the bridge (B) =.?

The length of the bridge can be obtained by using the pythagoras theory as illustrated below:

C² = A² + B²

340² = 160² + B²

115600 = 25600 + B²

Collect like terms

115600 – 25600 = B²

90000 = B²

Take the square root of both side

B = √90000

B = 300 feet

Therefore, the length of the bridge is 300 feet

Other Questions
Presented below are selected balances for Tucker as of December 31, 2018: Cash $50,000 Administrative expenses 90,000 Selling expenses 80,000 Accumulated other comprehensive income, beginning 55,000 Net sales 540,000 Cost of goods sold 210,000 Common stock, beginning 75,000 Cash dividends declared 20,000 Unrealized loss on available-for-sale debt securities 7,000 Interest expense 10,000 Cash dividends paid 15,000 Operating income from discontinued operations (before taxes) 30,000 Retained earnings, beginning 90,000 Loss on disposal of discontinued operations (before taxes) 45,000 Effective tax rate 30% Required:a. Compute net income for 2020.b. Prepare an income statement for 2018 assuming 10,000 shares of common stock were outstanding all year. Match the terms below to the correct definitions3. Atom1. The mass on the periodic table.b. Electrons2. Region surrounding the nucleus where electrons are found.C. Protons3. Positively charged center of an atom.d. Neutrons4. Particles that differ in number between isotopes.e. Electroncloud5. Vertical column in the periodic table.1. Nucleus6. Positively charged particles in an atom.R. Quark7. Negatively charged particles in the outermost energy levels of the electron cloud.8. Table that organizes the elements by properties.9. Atoms of the same element that have different masses.h. Atomicnumber1. Mass number10. Smallest known particle that makes up protons and neutrons.j. Averageatomic mass11. All elements in the same one of these has the same number of energy levels intheir electron cloud.k. Isotopes12. The smallest form of matter that still retains the properties of an element.1. Valenceelectrons13. Negatively charged particles in an atom.m. Group14. The sum of protons and neutrons in an atom.n. Period15. Represents the identity of an element.o. PeriodicTable Name three parts of the world that have a great need for wastewater treatment,and explain each in some detail. The technique used to conclude about the population on the basis of a sample is called If you want to make healthy choices, you need to A. learn about your body B. discuss your health with a doctor C. have a medical examination Which of the following scenarios is representative of parasitism? A.Tapeworms living in mammal's intestinal tract B.Remora fish attaching themselves to sharks C.Birds feeding on insects stirred up by grazing animals D.Birds eating scraps of food from crocodile's teeth The Watergate cover-up involved paying each "plumber" how much money to keep quiet? A. $100,000 B. $200,000 C. $300,000 D. $400,000 A minor injury is one that __________.A.results in long-term health problemsB.requires halting participation in the activityC.injures the head or spineD.does not impair athletic performance How do the results of Albert Banduras experiment support Zimbardos theories about immoral behavior? (Paragraphs 6-8) What is -2x-4y=36 written in slope-intercept form?Question 3 options:y=12x+9y=12x+9y=2x9y=12x9 I will give a brainliest The inverse of a linear function is a blank function If an object is moving up, is it considered to have a positive or negative velocity? 3x+2=7x+6 what is x "What is the All-or-None Response? If the All-or-None Response occurs in all muscle cells, explain what occurs differently in a muscle when you lift a 5 lb. weight as opposed to a 50 lb. weight."I already slightly understand how the all or none response works, but the second part of the question confuses me. Thanks in advance! On the map, which colony is the arrow pointing to? (2 points)Thirteen ColoniesAtlantic OceanWYConnecticutMarylandPennsylvaniaNew Jersey which is the best series on netflix ? what is the estimated square root of 15 closest to Explain the ties that most Arabs shared during this time. Use the following terms in your explanation: government, culture, language.Please help HELP ASAP!!!!!Which of the following best describes the motion of the object in this p-t graph What value of x makes the equation true? 0.25x + .5x 4 3 = 0 + 5 2