Find the width of a rectangle with a perimeter of 90 and a length of 15

Mathematics

1 answer:

Irina18 [472]3 years ago

6 0

Perimeter 90
Height 15
Answer
30

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In a given amount of time , Nijah drove twice as far as Jared. Altogether they drove 135 miles. Find the number of miles driven

Alexandra [31]

2x + x = 135
3x = 135
x = 135 /3
x = 45

Nijah = 2*45 = 90 miles

8 0

3 years ago

Find the probability of at least 2 girls in 8 births. assume that male and female births are equally likely and that the births

Afina-wow [57]

At least two girls means either 2, 3 ... or 8 girls.
Using the binomial law, we can write the probability in the form:
B(2,0.5)+B(3,05)+...+B(8,0.5)= $0.0039(C_8^2+...+C_8^8)$
Continue simplifying:
$C_8^2+...+C_8^8=2^8-C_8^1=2^8-8=248\\\text{We deduce the probability of the event "at least two girls in birth ":}\\0.0039\times248=0.96\\\text{The above probability (0.96) means that the event is very likely}$

6 0

3 years ago

5 3/4 quarts = how many cups

SIZIF [17.4K]

Answer:

23 cups

hope this helped

8 0

2 years ago

USE DISTANECE= RATE * TIME

torisob [31]

A]
D=R×t
d=5.8r
d2=5.1(r+7)
0.7r=35.7
r=51 mi/hr
thus the average speed on the outbound trip would be:
51+7=58 mi/hr

b]
let speed of fishing boat=x km/h
speed of cruise ship=(x+12.5) km/h
distance traveled by fishing boat=11.5×x=11.5x km
distance traveled by cruise ship=(x+12.5)×11=(11x+137.5) km
Total distance covered by the ships:
11.5x+11x+137.5=322
22.5x=322-137.5
22.5x=184.5
thus
x=184.5/22.5
x=8.2 km/h
The speed of fishing boat is 8.2 km/hr

4 0

3 years ago

Read 2 more answers

The school that Kathryn goes to is selling tickets to the annual talent show. On the first day of ticket sales the school sold 1

Kobotan [32]

Answer:

Step-by-step explanation:

a+s=14

a=14-s

a+8s=56, using a from above in this equation gives

14-s+8s=56

14+7s=56

7s=42

s=6

a=14-s

a=14-6=8

So student tickets cost $6 and adult tickets cost $8.

5 0

2 years ago