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2 years ago

In △PQR, m∠P = 60 degrees, m∠Q = 30 degrees, and m∠R=90 degrees. Which of the following statements about ∆PQR are true?

Mathematics

1 answer:

LuckyWell [14K]2 years ago

5 0

Answer:A,B,F

Step-by-step explanation:

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Firlakuza [10]

Answer:

nhjggggggggggggj

Step-by-step explanation:

5 0

2 years ago

Analysis of an accident scene indicates a car was traveling at a velocity of 69.5 mph (31.1 m/s) along the positive x-axis at th

STatiana [176]

We can find the acceleration via

${v_f}^2-{v_i}^2=2a\Delta x$

We have

$\left(5.20\dfrac{\rm m}{\rm s}\right)^2-\left(31.1\dfrac{\rm m}{\rm s}\right)^2=2a(115\,\mathrm m)$

$\implies\boxed{a=-4.09\dfrac{\rm m}{\mathrm s^2}}$

Then by definition of average acceleration,

$a_{\rm ave}=\dfrac{v_f-v_i}t$

so that

$-4.09\dfrac{\rm m}{\mathrm s^2}=\dfrac{5.20\frac{\rm m}{\rm s}-31.1\frac{\rm m}{\rm s}}t$

$\implies\boxed{t=6.33\,\mathrm s}$

We alternatively could have found the time without knowing the acceleration. Since acceleration is constant, the average velocity is

$v_{\rm ave}=\dfrac{x_f-x_i}t=\dfrac{v_f+v_i}2$

Then

$\dfrac{115\,\rm m}t=\dfrac{5.20\frac{\rm m}{\rm s}+31.1\frac{\rm m}{\rm s}}2$

$\implies\boxed{t=6.33\,\mathrm s}$

7 0

2 years ago

Help me please thanks before

sdas [7]

-17 + 28 = 11

hope this helps, give brainliest

8 0

3 years ago

Read 2 more answers

Officials estimate that 320,000 Boston-area partygoers attended last year's Independence Day celebration on the banks of the Cha

Anna11 [10]

40 ton x 2000 = 80,000 pounds

320000/8000 = 40 pounds per person

7 0

2 years ago

A department store buys 300 shirts at a cost of $2,400 and sells them at a selling price of $10 each. Find the percent markup.

Solnce55 [7]

Answer:

67%

Step-by-step explanation:

Given : A department store buys 300 shirts at a cost of $1800 .

Then By unitary method , the cost of one shirt = Cost of 300 shirts divided by 300

= $1800 ÷ 300 = $6

i.e. cost of one shirt = $6

Also, Selling price of one shirt = $10

Price mark up = Selling price - Cost price

= $10-$6 = $4

The percent mark up=

(rounded to the nearest percent)

Hence, the percent markup = 67%

4 0

2 years ago