Solve the system of equations using the elimination method and enter the value of y
4x - 5y = -9
- 4x + y = -7
Answer:
y = 4; x = 11/4
Step-by-step explanation:
4x - 5y = -9
-4x + y = -7
Add the two equations to eliminate x:
-4y = -16
-4y/-4 = -16/-4
y = 4
Plug in y for x
4x - 5y = -9
4x - 5(4) = -9
4x - 20 = -9
4x = -9 + 20
4x = 11
4x/4 = 11/4
x = 11/4
Answer from Gauthmath
(a) Mary and Cynthia were building a cone-shaped sand castle. After some time, the diameter of
the sand shaped cone was 14 in. and the height was 15 in. What is the appoximate volume of the
sand cone rounded to the nearest tenth? (Show work!!) PLEASE HELP!
Answer:
[tex]\displaystyle V\approx 769.7\text{ in}^3[/tex]
Step-by-step explanation:
We are given that the diameter of the sand-shaped cone is 14 inches, and the height is 15 inches.
The volume for a cone is given by:
[tex]\displaystyle V=\frac{1}{3}\pi r^2h[/tex]
Where r is the radius and h is the height.
Since the diameter is 14, the radius is 7.
And we are given that the height is 15.
Therefore, the volume will be:
[tex]\displaystyle V=\frac{1}{3}\pi (7)^2(15)[/tex]
Use a calculator:
[tex]\displaystyle V\approx 769.7\text{ in}^3[/tex]
The volume of the cone is approximately 769.7 cubic inches.
What is the equation of the following line?
The number of siblings a student has and the grades they have in math class.
A.
Positive correlation
B.
Negative correlation
C.
No correlation
Solve and show work please! Help is appreciated ♥️
Answer:
16 pi
Step-by-step explanation:
Since 2r is the circumference and the radius is 8, it's 8 x 2 which gives you 16. You don't need to add in the pi since they already gave you at the options.
For a cat that weighs 15 pounds, rank the following scale weights from least
accurate to most accurate.
15.10 pounds
13.9 pounds
16.2 pounds
15.01 pounds
Answer:
16.2 pounds (least accurate)
13.9 pounds (2nd least accurate)
15.10 pounds (2nd most accurate)
15.01 pounds (most accurate)
Step-by-step explanation:
I hope this helps :)
Answer:
16.2 pounds
13.9 pounds
15.10 pounds
15.01 pounds
Please hurry! Will be choosing brainliest!
In the cone below, the radius is 6 meters and the height is 8 meters.
Find the volume of the cylinder pictured below. Use 3.14 for pi. Give your answer
Answer:
301.59
Step-by-step explanation:
Which graph shows a linear function?
Answer:
None of the above...
Step-by-step explanation:
The first one is a cubic function and the v-shaped one is an absolute value function.
Answer:
It is the 2nd graph. The graph that passes through x=3 and y=3.
Step-by-step explanation:
Factorise
3ab + 3a + 2b + 2
Answer:
3ab + 3a + 2b + 2
3a(b+1)+2(b+1)
(b+1)(3a+2)
• Which graph represents the inequality 3 > 15?
Answer:
The second one
Step-by-step explanation:
2. The sides of a triangle are in the ratio 3:7:10 and the perimeter is 80 inches.
What are the lengths of the sides of the triangle?
Can anyone help please ?
Step-by-step explanation:
3+7+10=20
80/20=4
1 ratio =4
3(4) : 7(4) : 10(4)
= 12 : 28 : 40
.nooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
Answer: What is this free?
Answer:
yes
Step-by-step explanation:
yes+yes(no-no)
=yes
A group of five students have a mean test score of "34.2." Another student has a score of 50. What is the mean average of all "six" students?
Answer:
The mean average of all "six" students is 36.83.
Step-by-step explanation:
Mean:
The mean is the sum of all scores divided by the number of scores.
A group of five students have a mean test score of "34.2." Another student has a score of 50.
This means that the sum is given by:
[tex]S = 5*34.2 + 50 = 171 + 50 = 221[/tex]
What is the mean average of all "six" students?
Sum of 6 students is 221. So
[tex]M = \frac{221}{6} = 36.83[/tex]
The mean average of all "six" students is 36.83.
Kali runs 20 laps around the track each day.Each lap around the track is 400 meters. How many days will it take kali to run a total or 12 kilometers?
Answer:
Step-by-step Explanation:
Answer:
1 and a half days
Step-by-step explanation:
400 meters x 20 laps = 8000 meters
12 kilometers - 12000 meters
1day- 8000 meters
12000 meters-8000 meters= 4000 meters
8000÷4000=2
1 day and a half
What is (1.2 x 10^-5) / 4 in scientific notation??
Answer:
3×[tex]10^{-6}[/tex]
Step-by-step explanation:
Hope it helps ;)
Answer:
3x10^-6
Step-by-step explanation:
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. The sign of the exponent will depend on the direction you are moving the decimal.
Solve for x.
X -8 = -11
PLZ I NEED ANSWER ASAP
Answer:
i had this text by ms putz u prob know her she ur teacher that answer is -3 because if you subtract -8 from -11 you will get -3
Step-by-step explanation:
Which of the following are dependent events? Select all that apply.
You draw a marble from a bag, replace it, and draw again.
You flip a coin and roll a number cube.
You draw two numbers from 1 to 10 from a hat without replacing them first.
You randomly choose two socks from a drawer, hoping they will match.
Answer: all
Step-by-step explanation:
Answer: You randomly choose two socks from a drawer, hoping they will match.
You draw two numbers from 1 to 10 from a hat without replacing them first.
Step-by-step explanation:
dependent events: compound events in which one event affects the likelihood of the other event
independent events:compound events in which one event does not affect the likelihood of the other event
A parallelogram has an area of 37.72 m² and a height of 4.6 m.
How long is the base of the parallelogram?
Enter your answer as a decimal in the box
Answer:
8.2
Step-by-step explanation:
area=b*h
37.72=b*4.7
b=37.72/4.7
=8.2
Answer:
Step-by-step explanation:
Area of parallelogram= base×perpendicular height
37.72m²=base×4.6m
base= 37.72m²/4.6m²
base= 8.2m
3. The measure of an interior angle of a regular polygon is 140. Find the number of sides the polygon has.
Answer:
I hope this will help u
Step-by-step explanation:
Each interior angle of a regular polygon = 140 deg. So each exterior angle of the regular polygon = 180-140 = 40 deg. Hence the regular polygon has 360/40 = 9 sides.
Please mark me as Brilliant
The diagram shows the repairs preformed on two types of cars. Compare the car types using the median or mean.
Answer:
there is no diagram
Step-by-step explanation:
you will need to edit this question so that way we can see the diagram
Answer:
The median is the same for both car types, but Bandits have the lower mean.
Step-by-step explanation:
I took the Iready quiz and got the question right. Hope this helps!
find an equation for the nth term of a geometric sequence where the second and fifth terms are -8 and 512
Answer:
[tex]n_x = -4n_{x-1}\\[/tex]
where [tex]n_1[/tex] = 2
Step-by-step explanation:
512/-8 = -64
difference of n = 3
[tex]\sqrt[3]{64} = 4[/tex]
[tex]n_x = -4n_{x-1}\\[/tex]
where [tex]n_1[/tex] = 2
Find the solution of the system of equations. -3x – 2y = 36 3х – 5y = 6
Answer:
y = -6
x = -8
Step-by-step explanation:
I hope you can read my handwriting.
Have a wonderful day!
PLEASE I NEED HELP THIS NEEDS TO GET DONE SOON AND IM STUCK):
Question 2 Multiple Choice Worth 2 points) (06.03) For the expression y + 6 - 3, determine the coefficient for the variable term 1 06
Answer:
1
Step-by-step explanation:
whenever there is a varible alone the coefficient is 1
What is the answer to the angle BD?
straight angle. this is easyyy
2 more help !!!!!!!!
Tell whether the angles are adjacent or vertical. Then find the value of x . 117° xº
Answer:
please give the picture
Step-by-step explanation:
I will then solve this
Multiplying - make sure your answer is in fraction form.
1.4 x 0.8 =
2.3 x 1.8 =
2.37 x 1.2 =
Answer:
Multiplying - make sure your answer is in fraction form.
1.4 x 0.8 = 28/25
2.3 x 1.8 =207/50
2.37 x 1.2 =721/250
Which one is the answer I think it’s four or five
Answer:
The answer is 4 (B)
Step-by-step explanation:
Hope this Helped
The length of ZX is 2 units.
What is the perimeter of triangle XYZ?
Answer:
5+3 square root of 5 units
gamitin ang alin man sa mga digit na ito 0 3 6 at 7 bumuo ng tig dalawang 2 digit na bilang at three digit na bilang divide ang mga bilang na nabuo sa mga bilang na nasa hanay ng divisor at isulat ang sagot sa hanay ng quotient
Dividend Divisor Quotient
7
9
Answer: gamitin ang alin man sa mga digit na ito 0 3 6 at 7 bumuo ng tig dalawang 2 digit na bilang at three digit na bilang divide ang mga bilang na nabuo sa mga bilang na nasa hanay ng divisor at isulat ang sagot sa hanay ng quotient
Step-by-step explanation: