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butalik [34]
3 years ago
10

(15P) PLEASE HELP ME ASAP NEED HELP!

Mathematics
1 answer:
olya-2409 [2.1K]3 years ago
7 0

Answer:

x=7

y=2

Step-by-step explanation:

10 + 2x = -2y ➡y = -5-x

replace y with -5-x in the first equation

-5-x-x = 9➡ -2x-5 = 9 ➡-2x = 9+5 ➡ x = -7

now use this information to find value of y

y - (-7)=9 ➡y = 2

You might be interested in
The total surface area of a cube is 96cm2, find its volume.
Setler [38]

Answer:

\huge\boxed{V=64cm^3}

Step-by-step explanation:

The formula of a surface area of a cube:

SA=6a^2

The formula of a volume of a cube:

V=a^3

We have

SA=96cm^2

Calculate the edge length (<em>a</em>).

6a^2=96           <em>divide both sides by 6</em>

a^2=16\to a=\sqrt{16}\\\\a=4(cm)

Calculate the volume of a cube:

V=4^3=64(cm^3)

6 0
2 years ago
20 points plzzz help asap
Agata [3.3K]
It is A I hope that helps for you
4 0
2 years ago
What is the area of the rectangle
Elis [28]

Answer:

20

Step-by-step explanation:

Subtract the 2 from the width of 7, and then multiply the height by the width.

4x5=20

8 0
2 years ago
A prop for the theater club’s play is constructed as a cone topped with a half-sphere. What is the volume of the prop? Round you
IrinaVladis [17]

Answer:

1875.6 in³

Step-by-step explanation:

(⅓×3.14×8²×12) + (⅔×3.14×8³)

1875.626667 in³

5 0
3 years ago
your gym membership cost $33 per month after an initial membership fee. you paid a total of $228 after 6 months. writer an equat
grin007 [14]

Answer:

what i did was multiply 33*6 and got 198 and then 228-198 to find out that the initial fee was 30 dollars. then multiply 33*9+30 to get a  9-month total cost of $327

Step-by-step explanation:

cost = $33 per month + fee  

1.  c(m) = 33m + f

 33(6) + f = 228

198 + f = 228

f = $30 membership fee  

c(m) = 33m + 30

 2.  at 9 months:  33(9) + 30 = $327

hopefully this helps :)

have a nice day !!

7 0
2 years ago
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