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3 years ago

URGENT AND EASY TO DO -7(7x+8)≤287 PLEASE

Mathematics

2 answers:

kondor19780726 [428]3 years ago

8 0

Answer:

x≥−7

Step-by-step explanation:

tresset_1 [31]3 years ago

3 0

Answer:

x $\geq$ -7

Step-by-step explanation:

-49x - 56 $\leq$ 287

-49x $\leq$ 343

x $\geq$ -7

note: if you're going to divide by a negative number you need to flip the sign.

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X=2π/3

Marina86 [1]

Answer:

$cos{\frac{2\pi}{3}}=-\frac{1}{2}$ .

Reference angle is $\frac{\pi}{3}$

Step-by-step explanation:

Given the value of x. we have to find the correct value of cosx.

$x=\frac{2\pi}{3}$

Now, we have to find the exact value of $cos{\frac{2\pi}{3}}$

$cos{\frac{2\pi}{3}}=cos(\frac{\pi}{2}+\frac{\pi}{6})$

$=-sin(\frac{\pi}{6})$

$=-\frac{1}{2}$

Now, we have to find the reference angle of $x=\frac{2\pi}{3}$ .

Since the angle $x=\frac{2\pi}{3}$ lies in second quadrant, the reference angle formula is

Reference angle= $\pi-given angle$ .

= $\pi-\frac{2\pi}{3}=\frac{\pi}{3}$

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3 years ago

Solve the Equation. Show work and explain steps. 2(x +4) +2 = 3(x − 2) +x

Sophie [7]

Answer:

X = 8

Step-by-step explanation:

A breakdown of the calculation is attached. I hope you find it helpful, thanks.

6 0

3 years ago

Read 2 more answers

Can someone give me an example of substitution

Luda [366]

Answer:

Substituton is like being a back up to anything and for anuone

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3 years ago

Answer both questions

Brrunno [24]

Answer:

Step-by-step explanation:

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alexgriva [62]

ok the first one

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