Mathematics High School

Ok last question its very "hard" mods don't delete

what is 3x+12= 42

Answers

Answer 1

Answer:

x is 10.

Step-by-step explanation:

3x + 12 = 42

Subtract 12 from both sides

3x = 42 - 12

Subtract 12 from 42 to get 30

3x = 30

Divide both sides by 3

x = 30/3

Divide 30 by 3 to get 10

x = 10

Related Questions

Help me please It is timed​

Answers

according to me answer is

0.5b

Answer:

b

Step-by-step explanation:

Anya found the slope of the line that passes through the points (–7, 4) and (2, –3). Her work is shown below.

Let (x2, y2) be (–7, 4) and (x1, y1) be (2, –3).

m = m equals StartFraction x 2 minus x 1 over y 2 minus y 1.

= Equals StartFraction negative 7 minus 2 Over 4 minus negative 3.

= Negative StartFraction 9 Over 7 EndFraction.

The slope is Negative StartFraction 9 Over 7 EndFraction..

What error did she make?

She simplified the denominator incorrectly. The denominator simplifies to –7.
She labeled the points incorrectly. The point (–7, 4) should be (x1, y1).
She used an incorrect formula. The formula should be the change in y-values with respect to the change in the x-values.
She used an incorrect formula. The formula should be the sum of the x-values with respect to the sum of the y-values.

Answers

Answer:

It is C 100% 2021 on edge

Step-by-step explanation:

Answer:

The answer is C "She used an incorrect formula. The formula should be the change in y-values with respect to the change in the x-values."

Step-by-step explanation:

I just did it and got it right.

Need help ASAP !!!!!

Answers

2,880m because i basically multiplied all the sides by each other to find the area

Simplify the expression: 12 + 6w² + 5m² + 14w + 9m² - 4w - 10

Answers

Answer:

[tex]14m^{2}[/tex]+[tex]6w^{2}[/tex]+10w+2

Step-by-step explanation:

You have to add similar numbers.

Simplify the expression 6h+​(−7.7d​)−18+5d−2.8h
.​

Answers

Answer : -2.7d+3.2h-18

Please leave a thanks <3
Use Photomath it gives out detailed answers

Hannah invested $540 in an account paying an interest rate of 4.7% compounded continuously. Assuming no deposits or withdrawals are made, how much money, to the nearest hundred dollars, would be in the account after 18 years?

Answers

I got $1,234 by the 18th year

Answer:

1300

Step-by-step explanation:

did it on usatestprep

HELP AND QUICKK!!!!

Jada is going to the county fair and and would like to go on as many rides as she can. The entry fee to get into the fair is $8 and rides cost $2.50 each. If Jada spent $28 at the fair, how many rides did she go on?

A. Write an equation for this word problem.

B. Solve the equation.

C. Answer the question with a complete sentence in context.

Answers

Answer:

A) 8+2.50x=28

B) 8 rides

C) Jada can go on 8 rides before she has spent all of her money

Step-by-step explanation:

subtract the $8 fee from 28 and get 20, then divide 20 by how much each ride costs (2.50) and get 8 :)

Answer:

She went on 8 rides

Step-by-step explanation:

28-8=20÷2.50=8

Determine whether ABCD is a parallelogram if AB = 6, BC = 12, CD = 6, and DA = 12. Justify your answer
A/ Yes; Opposite sides are congruent to each other.
B/ Yes; Opposite sides are parallel to each other.
C/ Yes; Opposite angles are congruent to each other.
D/ No

Answers

A/ yes; opposite sides are congruent to each other.

PLEASE HELP ME!

Solve: system by elimination form

1.
2x + y = 25
3y = 2x - 13
----------------------------------------------------

Answers

2x+y=25
-2. -2
1y=23
1y=1y
Y=23
Here is the answer this is the full answer Im just typing cause the app want me to do

solve for t. -1 (t + 8) = -7.1 brainly

t=___?
(Please hurry!)

Answers

Answer:

.9

Step-by-step explanation:

-1(t+8) = -7.1

PEMDAS

So times the parenthesis by -1

-t - 8 = -7.1

Add the 8 to itself to get rid of it

Then since you added it on the left, add it to the right

-t = .9

t = .9

Please i need help with this please

Answers

Answer:

Your answer would be 9.

Step-by-step explanation:

You always do parenthesis first, 9-6 is 3, then you would do division 3÷3 is 1 then you multiply 4×2 and that would be 8, finally you would at the 8 and the 1 and that would give you 9 as your answer. Hope this helps

Parallel/perpendicular definition

Answers

Answer:

Parallel: extending in the same direction, everywhere equidistant.

Perpendicular: ar an angle of 90 to a givin line, plane or surface.

Answer:

Two or more straight lines having equal distance between them through out is parallel lines

Perpendicular lines are two lines at Right angles

can you help me please ​

Answers

Cos(5/12)=65.4
It won't let me do short anwser

Convert 2.1 A to nanometers

Answers

In words = two point one nm (nanometers)

Find an order pair (x,y) that is solution to the equation 3x-y=8

Answers

Answer:

(2.67,-8)

Step-by-step explanation:

You first make x 0 so it is -3x0 to cancel that out to find y. You then see that you get -y=8 so you make y positive by moving the negative to the other side to get y = -8. Then, you do the same type of process for x and get 2.67. I could be wrong but wanted help as much as I could!

you can buy 3 t-shirts for $22.50. write and solve a proportion that shows how many t-shirts you could buy with $110
​

Answers

Answer:

14.6 T-Shirt

Step-by-step explanation:

Well, you divide 22.50 and 3 and you get 7.5.

Once you get 7.5 you divide it by 110 which is 14.6

Mr. Bates and Ms. Psenicska like playing Pokemon. Mr. Bates has 3 packs of cards plus 2 other cards. Ms. Psenicska has 6 packs of cards plus 8 other cards. White an algebraic expression to represent this scenario.

Answers

Answer:

The only algebraic expressions we can find here are the ones for the number of cards that Mr. Bates and Ms. Psenicska have.

We know that Mr. Nates has 3 packs of cards, plus 2 other cards.

If each pack of cards has N cards, then the total number of cards of Mr. Nates is:

Mr. Nates = 3*N + 2

And Ms. Psenicska has 6 packs plus other 8 cards, then she has a total of:

Ms. Psenicska = 6*N + 8

These two are the only expressions we can make with the given information.

Marlene purchased 20 stamps at the post office for $8.40. What is the cost of one stamp?

Answers

Answer:

they were .42¢ a piece I think this is right

The cost of one stamp will be $0.42.

What is Division method?

Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications. For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.

Given that;

Marlene purchased 20 stamps at the post office for $8.40.

Now,

Since, The cost of 20 stamps = $8.40

Hence, The cost of 1 stamp = $8.40 / 20

                                          = $0.42

Thus, The cost of 1 stamp = $0.42

Learn more about the divide visit:

https://brainly.com/question/844312

#SPJ2

The nth term of a sequence is given by 3n + 7.
Write down the fifth term of this sequence.
I

Answers

3n+7=10,13,16,19,22
Fifth term in the sequence = 22
Answer:
22

Explanation:
n = 5
3 x 5 = 15
15 + 7 = 22

find the angles for

a=?
b=?
c=?​

Answers

53+44=97
180-97=83
C=83 degrees
b=180-83
b is 97 degree
180 because straight line btw
28+97=125
180-125=55
a=55 degrees
Angles in triangle add up to 180 degree s

2
Landon used a semicircle, a rectangle, and a right triangle to form the figure shown.
6 cm
4 cm
10 cm
Which is the best estimate of the area of the figure in square centimeters?
F
52 cm
44 cm
H
26 cm
J
38 cm
©2021 Illuminate Education, Inc.
O

Answers

Rectangular 4cm shown

Neeeeddd helllp again again

Answers

Answer:

A

Step-by-step explanation:

3.5 + p = 7.5

Subtract from 3.5 from both sides.

p = 7.5 - 3.5

Simplify

p = 4

A is the number line that has the correct answer.

2x + 3 = 7

418 = -22a

What are the VARIABLES in these two equations?​

Answers

Answer:

x=2

a=19

Step-by-step explanation:

2x+3=7

2x+3-3=7-3

2x=4

2x/2=4/2

x=2

418=-22a

418/(-22)=-22a/(-22)

19=a

Answer -
X=2
A=19
Explanation

Sheldon is creating a graph to represent the trip he takes from his home to his favorite clothing store. In his graph, one unit on the coordinate plane is equal to one mile. He draws a point at $\left(4,\ 3\right)$ to represent the location of his house. The store is $5$ miles away from his house. Which coordinate pairs could represent the location of Sheldon's favorite clothing store?

Answers

Answer:

hjgfghjk

Step-by-step explanation:

:)

Hey need help again guys

Answers

Answer:

the answer is 2x

Step-by-step explanation:

d 2x is the answer because 2x can factor into both numbers

How do I find volume of the cylinder?

Answers

58.5 please give me brainlyist

3y+9=x^2+6x isolate y

Answers

Answer: Answer is below mate!

Step-by-step explanation: Have a brilliant day-Lily ^_^

Yup the person on top of me is right!!!!

Name the following polynomial: 7n^3+10n^4+3n
A. cubic trinomial
B. cubic polynomial
C. quadratic trinomial
D. quartic trinomial

Answers

Answer:

Cubic Trinomial

it has 3 terms so it is Trinomial

and cubic because degree is 3

The name of the polynomial is a biquadratic trinomial. Then the correct option is D.

What is polynomial?

A polynomial expression is an algebraic expression with variables and coefficients.

The polynomial is given below.

⇒ 7n³ + 10n⁴ + 3n

The number of the terms in the polynomial is 3, then the polynomial is a trinomial.

And the degrees of the polynomial is 4, then the trinomial is a biquadratic trinomial.

Then the correct option is D.

More about the polynomial link is given below.

https://brainly.com/question/17822016

#SPJ2

Your textbook has a length of 30 cm, width of 25 cm, and a height of 4 cm. What is its volume?

Answers

Hey there! The answer you're looking for is 3000 centimeters^3. If we take the first number, 30 cm, and multiply it by the second number, 25 cm, we're left with 750 cm^2. We use the last digit to multiply the 750 cm^2 into 3000 cm^3. Hope this helped!

Pls help me add me on ig

Answers

Answer:

false lol i thinkkk

Step-by-step explanation:

Answer:

the answer is no

Step-by-step explanation:

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