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Nataly [62]
3 years ago
10

What is the length of QR

Mathematics
2 answers:
raketka [301]3 years ago
8 0

Answer:

8

Step-by-step explanation:

Set 3n-1=5n-7.

Solve.

n=3.

Plug in 3 to 5n-7.

QR=8

Rus_ich [418]3 years ago
8 0

Answer:

QR=8

Step-by-step explanation:

so using the fact that the two triangles are congruent, we can determine:

5n-7=3n-1

5n-6=3n

2n-6=0

n=3

so we replace all n in 5n-7 with three

5x3-7

15-7

8

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At the mall, buying a pair of shoes and buying a book are independent events.The probability that a shopper buys shoes is 0.20.
Goryan [66]

Answer: Probability that a shopper buys shoes and a book is 0.02.

Step-by-step explanation:

Since we have given that

Event A : Buying a pair of shoes

Event B:  Buying a book

Since A and B are independent events.

Probability that a shopper buys shoes i.e.

P(A) = 0.20

Probability that a shopper buys a book i.e.

P(B)=0.10

So, we need to find the probability that a shopper buys shoes and a book is given by

P(A\ and\ B)=P(A\cap B)=P(A).P(B)\\\\P(A\cap B)=0.20\times 0.10\\\\P(A\cap B)=0.02

Hence, Probability that a shopper buys shoes and a book is 0.02.

3 0
3 years ago
A store offers a 15% discount on a skirt. If Bernice pays $40.80 for the skirt, what was the list price of the skirt before the
marusya05 [52]

The answer is B

If you multiply each price by .15 then subtract it  example below.

48.00 × .15 = 7.20

Then subtract that number to the price you will get how much the skirt cost after the discount.

48.00-7.20=40,80

4 0
3 years ago
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What type of triangle is shown in the figure?
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A map has a scale of 1 in : 3 km. If the actual distance is 15 km, what is the distance on the map?
Black_prince [1.1K]

Answer:

5 in.

Step-by-step explanation:

The ratio of map distance to real distance is 1 in : 3 km meaning that 1 inch on the map describes 15 km in real life.

15 km is 5 times 3 km, so the map distance is 5 times 1 in., or 5 in.

1 in. x 5 : 3 km x 5

This is a "school math" problem where things come out nicely!  Another way to look at this is with equivalent fractions.

\frac{\text{1 in}}{\text{5 km}} = \frac{\text{m}}{\text{15 km}}

"cross multiply"

5m = (15)(1)\\5m=15\\m=3 \text{ in.}

4 0
3 years ago
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