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3 years ago

Simplify the expression. -2x + -5 + 8x + -4

Mathematics

1 answer:

Oksi-84 [34.3K]3 years ago

7 0

Answer:

6x - 9

Step-by-step explanation:

Simplify by combining the like terms in steps

-2x + -5 + 8x + -4 =
(8x - 2x) - (5 + 4) =
6x - 9

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What is the domain of the function f(x) = sqrt x-9 + 5?

klemol [59]

Answer:

D. x≥ 9

Step-by-step explanation:

√x-9 should be ≥ 0

so, x-9≥0

=> x ≥ 9

8 0

3 years ago

You are selling tickets for the school play "13". Student tickets cost $4 and general admission tickets cost $6. You sell 525 ti

Scilla [17]

Answer:

Step-by-step explanation:

s= student ticket

g= general admisson ticket

4s+6g=2876

s+g=525

4s+6g=2876

-4s-4g=-2100

add both equations

2g=776

g=388

s+g=525

s+388=525

s=137

6 0

3 years ago

-8x-3=13-9x what is the answer for x?

GREYUIT [131]

Answer:

x=16

Step-by-step explanation:

-8x-3=13-9x

-8x+9x=13+3

x=16

6 0

3 years ago

Read 2 more answers

Write an equation of the line that passes through (2, 2) and is parallel to the line y = 7x

zimovet [89]

Answer:

y = 7x - 12

Step-by-step explanation:

Parallel lines have same slope.

y = mx + b

m - > slope & b -> y-intercept

y = 7x

So, slope = 7 & (2 , 2)

y - y1 = m(x -x1)

y - 2 = 7(x - 2)

y - 2 = 7x - 14

y = 7x - 14 + 2

y = 7x - 12

4 0

3 years ago

Quick algebra 1 question for 10 points!

jonny [76]

Answer:

$\displaystyle{f(x) = -2(x-3)^2 + 2}$

Step-by-step explanation:

To find y-intercept of a graph, we have to substitute x = 0 to find it - consider each functions:

First Choice

$\displaystyle{f(x) = 2x(x+14)-64}\\\\\displaystyle{f(0) = 2\cdot 0(0+14)-64}\\\\\displaystyle{f(0) = 0\cdot 14-64}\\\\\displaystyle{f(0) = -64}$

Second Choice

$\displaystyle{f(x) = (x+4)^2+2x}\\\\\displaystyle{f(0) = (0+4)^2 + 2(0)}\\\\\displaystyle{f(0) = 4^2}\\\\\displaystyle{f(0) = 16}$

Third Choice

$\displaystyle{f(x) = (x-16)^2 + 4}\\\\\displaystyle{f(0) = (0-16)^2 + 4}\\\\\displaystyle{f(0) = (-16)^2 + 4}\\\\\displaystyle{f(0) = 256 + 4}\\\\\displaystyle{f(0) = 260}$

Fourth Choice

$\displaystyle{f(x) = -2(x-3)^2 + 2}\\\\\displaystyle{f(0) = -2(0-3)^2 + 2}\\\\\displaystyle{f(0) = -2(-3)^2 + 2}\\\\\displaystyle{f(0) = -2\cdot 9 + 2}\\\\\displaystyle{f(0) = -18+2}\\\\\displaystyle{f(0) = -16}\\$

Therefore, fourth choice is correct.

6 0

2 years ago