3 years ago

Which number line model represents the expression -2+(-7)? Khan academy help!!!!!

Mathematics

1 answer:

gtnhenbr [62]3 years ago

6 0

-9 because 2+7=9 so the negative part oh then must be -9

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If y varies directly as x, and y=6 as x=-1, find y for the x-value of 5

Tema [17]

Answer:

$y=-30$

Step-by-step explanation:

we are given

y varies directly as x

so, we can write equation as

$y=kx$

where

k is constant of proportionality

We have

at x=-1 , y=6

so, we can use it to find k

$6=k(-1)$

so, we get

$k=-6$

now, we can plug it back

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now, we can plug x=5

and we get

$y=-6\times 5$

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6 0

3 years ago

Simplify 3a + 2b - 8a + b

Harlamova29_29 [7]

To simplify 3a + 2b - 8a + b, we need to combine like terms. Like terms are terms that share common variables. In this expression, the two variables are terms with a and terms with b. The terms that have a are 3a and -8a. The terms that have b are 2b and b. Now we can separate them and simplify.

(3a - 8a) + (2b + b)

-5a + 3b

6 0

3 years ago

Read 2 more answers

Solve the inequality.<br><br> 2(4x – 3) ≥ –3(3x) + 5x?

Alinara [238K]

Answer:

x≥1/2

Step-by-step explanation:

6 0

4 years ago