3 years ago

Test time limit need answer quickly!

Mathematics

1 answer:

Rus_ich [418]3 years ago

3 0

Answer:

its b!!! gimmie brainliest

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In ΔPQR, \overline{PR} PR is extended through point R to point S, \text{m}\angle QRS = (10x-1)^{\circ}m∠QRS=(10x−1) ∘ , \text{m}

RUDIKE [14]

Answer:

<QRS = 55 degrees

Step-by-step explanation:

Given the following

m∠QRS=(10x−1) ∘

∠RPQ=(3x+17) ∘

m∠PQR=(2x+12)

External angle m<QRS = 10x-1

Interior angles are m∠RPQ=(3x+17) ∘ and m∠PQR=(2x+12)

Using the law that the sum of interior angle is equal to exterior

10x + 1 = 3x+17 + 2x + 12

10x+1 = 5x+29

10x-5x = 29-1

5x = 28

x = 28/5

x = 5.6

Get m<QRS

Recall that <QRS = 10x - 1

<QRS = 10(5.6) - 1

<QRS = 56-1

<QRS = 55 degrees

6 0

3 years ago

PLEASE HELP 5 STAR + BRAINLY IF RIGHT!

Sever21 [200]

Right your ratio of $\frac{8}{12}$
Simplify fraction to 3/4
Now set it up with c/100 to find the percent (c equaling the percentage of caremel brownies)

Cross multiplty:
$\frac{2}{3} \frac{c}{100}$

Crossmultiply:
3c = 200
Divide (solve equation)

c = <span>66.6666666667</span>

7 0

3 years ago

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Prove<br>that:<br>cos^3A Cos3A + sin^3A.sin 3A=cos^3 2A

aalyn [17]

Answer: