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3 years ago

Use PQR below to answer the question that follows:

Mathematics

1 answer:

Luden [163]3 years ago

3 0

Answer:

Angle P is congruent to itself due to the reflexive property.

Explanation:

Angle P must be congruent to angle S through corresponding angle theory.

Otherwise, it wouldn't prove ΔPQR is similar to ΔSTR.

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Marcie bought a total of 20 used books and cds during a yard sale for a total of 54.50$. of books cost 1.50$ each and cds 5$ eac

melomori [17]

Let numbers of books be 'b' and numbers of CDs be 'c'

We can set up two equations:
Equation [1] ⇒ $b+c=20$
Equation [2] ⇒ $1.50b+5c=54.50$

We are solving for the number of books and the number of CDs bought

When we have two equations in terms of two different variables; $b$ and $c$ , that we need to solve, then this becomes a simultaneous equation problem.

First, rearrange Equation [1] to make either $b$ or $c$ the subject:
$b+c=20$
$b=20-c$

Then we substitute $b=20-c$ into Equation [2]
$1.50b+5c=54.50$
$1.50(20-c)+5c=54.50$
$30-1.50c+5c=54.50$
$5c-1.5c=54.50-30$
$3.5c=24.50$
$c=7$

Now we know the value of $c$ which is $c=7$ , substitute this value into $b=20-c$ we have $b=20-7=13$

Answer:
Numbers of books = 13
Numbers of CDs = 7

5 0

3 years ago

Helpppppp mathhh failing

LenKa [72]

Sin60 =b/10
√3/2 = b/10
b = √3 / 2 (10)
b = 5√3

d^2 = 10^2 - (5√3)^2
d^2 = 100 - 75
d^2 = 25
d = 5

sin30 = b/a
1/2 = 5√3 / a

a = 5√3 (2)
a = 10√3

c^2 = (10√3)^2 - (5√3)^2
c^2 = 300 - 75
c^2 = 225
c = 15

so
a =10√3, b = 5√3, c = 15,d = 5
answer is
D. last choice

4 0

3 years ago

Name an example of an acute angle, right angle, and straight angle according to their angle measures

oksian1 [2.3K]

Acute: anything less than 90 but greater than 0

so, m<CAD

right: angles at exactly 90 degrees, so m<AEC,

and obtuse angles are anything greater than 90 but less than 180 degrees,

so CDA (you can tell by the picture that it is bigger than 90- 90 degrees is exactly perpendicular)

8 0

2 years ago

Question 2 (1 point)

Vitek1552 [10]

Answer:

Step-by-step eEssential expenses most likely include:

Shelter.

Food and toiletries (this includes pet needs)

Utilities (this includes water, hydro, internet, etc.)

Car expenses.

Debt payments.

Insurances and medical needs.xplanation:

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2 years ago

Solve for the equation 2x+9=3x

Molodets [167]

Answer:

x=9

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Use PQR below to answer the question that follows:​

Use PQR below to answer the question that follows: