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3 years ago

7

simplify (3m+5)+7 (2m-2) show your work will Mark brainiest and be sure to simplify if you have time to answer a few more let me

know

1 answer:

lana [24]3 years ago

5 0

I did the work out on paper haha. If you still need help, I have time and I'm willing to try to help :)

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What is the formula for dilation (the formula we've been using for the entire module)

strojnjashka [21]

Answer:

Starting with ΔABC, draw the dilation image of the triangle with a center at the origin and a scale factor of two. Notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). Dilations involve multiplication! Dilation with scale factor 2, multiply by 2.

Step-by-step explanation:

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3 years ago

Round 593 to the nearest hundred

IrinaVladis [17]

Answer:

the answer is 600

Step-by-step explanation:

4 and below would go down, making it 500, but 5 and up would increase it making it 600.

hope this helps

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4 years ago

Two ratios that are equivalent to 7:10?

Vitek1552 [10]

Step-by-step explanation:

70:100 (They're related because 7 x 10 = 70 and 10 x 10 = 100)

14:20 (They're related because 7 x 2 = 14 and 10 x 2 = 20)

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3 years ago

Read 2 more answers

baherus [9]

Answer: see proof below

<u>Step-by-step explanation:</u>

Given: cos 330 = $\frac{\sqrt3}{2}$

Use the Double-Angle Identity: cos 2A = 2 cos² A - 1

$\text{Scratchwork:}\quad \bigg(\dfrac{\sqrt3 + 2}{2\sqrt2}\bigg)^2 = \dfrac{2\sqrt3 + 4}{8}$

Proof LHS → RHS:

LHS cos 165

Double-Angle: cos (2 · 165) = 2 cos² 165 - 1

⇒ cos 330 = 2 cos² 165 - 1

⇒ 2 cos² 165 = cos 330 + 1

Given: $2 \cos^2 165 = \dfrac{\sqrt3}{2} + 1$

$\rightarrow 2 \cos^2 165 = \dfrac{\sqrt3}{2} + \dfrac{2}{2}$

Divide by 2: $\cos^2 165 = \dfrac{\sqrt3+2}{4}$

$\rightarrow \cos^2 165 = \bigg(\dfrac{2}{2}\bigg)\dfrac{\sqrt3+2}{4}$

$\rightarrow \cos^2 165 = \dfrac{2\sqrt3+4}{8}$

Square root: $\sqrt{\cos^2 165} = \sqrt{\dfrac{4+2\sqrt3}{8}}$

Scratchwork: $\cos^2 165 = \bigg(\dfrac{\sqrt3+1}{2\sqrt2}\bigg)^2$

$\rightarrow \cos 165 = \pm \dfrac{\sqrt3+1}{2\sqrt2}$

Since cos 165 is in the 2nd Quadrant, the sign is NEGATIVE

$\rightarrow \cos 165 = - \dfrac{\sqrt3+1}{2\sqrt2}$

LHS = RHS $\checkmark$

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4 years ago

Identify the slope as a fraction y=2x+1

KiRa [710]

The slope will be 2/1x (2 over 1)
The y-intervept is 1 (positive 1)

Plz mark me as brainliest? Hope it helps!

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3 years ago