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3 years ago

What algebraic expression is equivalent to this expression? 9(2x+6) - 18

Mathematics

2 answers:

pogonyaev3 years ago

8 0

Answer:

18x+36

Step-by-step explanation:

We are given the expression:

$9(2x+6)-18$

We want to simplify the expression. First, let's distribute the 9. Multiply each term inside the parentheses by 9.

$(9*2x)+(9*6)-18$

$(18x)+(54)-18$

Combine like terms. There are 2 constants (terms without variables): 54 and -18. We can add them together.

$(18x)+(54+-18)$

$(18x)+(54-18)$

$18x+36$

The expression 9(2x+6)-18 is equivalent to 18x+36

Svet_ta [14]3 years ago

3 0

Answer:

18x+36

Step-by-step explanation:

9(2x+6) - 18

Distribute

9*2x + 9 *6 -18

18x +54 -18

Combine like terms

18x+36

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3 years ago

What is the equation of a line that is perpendicular to −x+2y=4 and passes through the point (−2, 1) ? Enter your equation in th

ANTONII [103]

Perpendicular lines have slopes that multiply to get -1
y=mx+b is the slope intercept equation
m=slope

so get into y=mx+b form
-x+2y=4
solve for y
add x both sides
2y=x+4
divide by 2 both sides
y=(1/2)x+2
the slope is 1/2

perppendicular line slope multiplies to -1
1/2 times what=-1
times 2/1 both sides
what=-2/1=-2

y=-2x+b
find b
we are given a point is (-2,1)
when x=-2, y=1
1=-2(-2)+b
1=4+b
minus 3 both sides
-3=b

so the equation is
y=-2x-3

your teacher might want it in standard form (ax+by=c) so
add 2x both sides
2x+y=-3 is an equation

so y=-2x-3 is correct (slope intercept form)
2x+y=-3 is also correct (standard form)

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2 years ago

What adds to -288 and adds to -41?

inna [77]

-329 hood this helps

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2 years ago

Read 2 more answers

Through: (1, -3), slope = -4<br> A) y=-x+4 B) y = x +4<br> C) y = 4x + 1 D) y=-4x + 1

Rudik [331]

Answer:

D) y = -4x + 1