Answer:
(60 - 4x)(50 + 2x) = 2,800
Step-by-step explanation:
1) solve for x by multiplying each equation with the opposite number and making one a negative
-4(5x + 2y =-9)-4
5(4x +3y = 25)5
2) multiply on both sides of equal sign
-20x - 8y = 36
20x + 15y = 125
3) add all the like terms to get new equation
7y = 161
4) simplify
7y = 161
/7 /7
y = 23
5) make ordered pair and then input 23 into original equation
( x , 23)
5x + 2y = -9
5x + 2(23) = -9
5x + 46 = -9
-46 -46
5x = -55
/5 /5
x = -11
6) input to ordered pair
(-11, 23)
7) Thats your answer!
5^2 = 25
13^2 = 169
169 - 25 = 144
The square root of 144 = 12.
12 + 2 = 14.
a^2 + b^2 = c^2
5^2 + b^2 = 13^2
25 + b^2 = 169
-25 -25
b^2 = 144
sqrt sqrt
b = 12
+2
14
Answer:
d
Step-by-step explanation:
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