Answer:
41.25
Step-by-step explanation:
if x=7.5 in order to find 5.5x you would multiply 5.5 by 7.5
=41.25
Answer :A)-2
Step-by-step explanation: If you multiply B; x + 9y =10 by -2 you will have -2 x+ -18y= -20. Then when you add B with a 2x + 8y = 5
-2x +-18y=-20
=0 +-10y=-15
Answer:
Sophia is 17 years old. Sophia's brother is 11 years old.
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
first of all, the correct factorization is
y = (x - 3)(x + 6)
because when we do the multiplication
y = x² + 6x - 3x - 18 = x² + 3x - 18
and then, the factorization tends us also directly the zero points, because y is only 0, when one of the factors is 0.
so, either x-3 or x+6 has to be 0 to make the whole expression 0.
and that is only for x=3 or x=-6
The resulting expression for the variable v is u - e - g
<h3>Subject of formulas</h3>
Subject of formula is a way of representing a variable in terms of another variable.
Given the expression below;
u=e+g-v
We are to make v the subject of the formula
Subtract e + g from both sides
u- (e + g)=e+g-v - (e+g)
u - (e+g) =v
Expand the left hand side of the expression
u - e - g = v
Swap
v = u - e - g
Hence the resulting expression for the variable v is u - e - g
Learn more on subject of formula here:brainly.com/question/657646
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