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Rama09 [41]
2 years ago
10

Help! I need an answer with an explanation or else I loose marks

Mathematics
1 answer:
7nadin3 [17]2 years ago
6 0

Answer:

c. (1,-2)

Step-by-step explanation:

by adding them together you can cancel out the y's and solve for x. once you get x, you can plug it into either equation and get y.

hope this helped :)

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The ratio of the volume of two solids is 1331:729. What is the ratio of the surface area
katovenus [111]
Volume ratio = 1331/729 which is the cube of the linear scale factor.
To find the linear scale factor, let find the cubic root of the numerator & the denominator:

∛1331 = ∛11³  = 11

&  ∛729 = ∛9³  = 9

So the linear scale is 11/9 ==> then the ratio of their surface area will be:

11²/9² ==> 121/81.
Note, if you have a linear scale, then the surface will be the square othis scale & the volume will be the cube of the linear scale
8 0
3 years ago
I need help with these two equations
Ivan

for these you need to rearrange the equations and do substitutions.

 #3 = if x+y=5 then you know x = 5-y

 now substitute that equation for x in the 2nd one so x + 2y = 8 becomes

5-y + 2y = 8 2y - y becomes 1y which becomes y then subtract 5 from each side to get y =3

now replace y with 3 in the first equation x = 5-3 so x = 2 

 so (2,3) is the answer


 same type of work for #4

2x-y=6 ,S0 y = 2X+6

 so now you have 4x+2(2x+6)=-4

that becomes 4x +4x+12 = -4

8x+8 = 1, x =1

y = 2(1)-6 = -4

 so answer is (1,-4)

7 0
3 years ago
What is 20,484,163 in expanded form
LuckyWell [14K]
20,000,000+400,000+80,000+4,000+100+60+3
4 0
3 years ago
Krya wants to solve the equation x/10+8=5 what steps should she use on both sides of the equation
maria [59]
Multiplied by 10
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7 0
3 years ago
Hello!! I have a question, can you please answer it. ^^
xeze [42]

Answer:

1. 75

2. 1

Step-by-step explanation:

5 0
3 years ago
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