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kati45 [8]
3 years ago
10

A truck waveling at an average rate of 45 miles per hour leaves a rest stop. Fifteen minutes later a car traveling at an average

rate of 60 miles per
hour leaves the same rest stop traveling the same route. How long will it take for the car to catch up with the truck?
A. 1h 15m
B. 15m
C. 45m
D. 3h
Mathematics
1 answer:
Lostsunrise [7]3 years ago
6 0

Answer:

c

Step-by-step explanation:

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In grade 9 high school to get an honor roll do they look at your midterm marks or do they look at your final marks. I have two s
BartSMP [9]

Answer:

Tortileni

Step-by-step explanation:

5 0
3 years ago
-3 (3c + 5) = 2 (10 - c)
Ilya [14]

Answer:-5

Step-by-step explanation:

You need to distribute on both sides so u get

9c-15=20-2c

Move variable to left side and change the sign

-9c+2c-15=20

Move constant to right side and change the sign

-9c+2c=20+15

Connect like terms

-7c=35

Divide

C=-5

5 0
2 years ago
The product of nine and the total of r and eight
yuradex [85]

Answer:

9(r + 8) = 9r +72

Step-by-step explanation:

9(r + 8)

9r + 72

Hope this helps!

7 0
2 years ago
A data set with a mean of 34 and a standard deviation of 2.5 is normally distributed
tresset_1 [31]

Answer:

a) z= \frac{34-34}{2.5}= 0

z= \frac{39-34}{2.5}= 2

And we want the probability from 0 to two deviations above the mean and we got 95/2 = 47.5 %

b) P(X

z= \frac{31.5-34}{2.5}= -1

So one deviation below the mean we have: (100-68)/2 = 16%

c) z= \frac{29-34}{2.5}= -2

z= \frac{36.5-34}{2.5}= 1

For this case below 2 deviation from the mean we have 2.5% and above 1 deviation from the mean we got 16% and then the percentage between -2 and 1 deviation above the mean we got: (100-16-2.5)% = 81.5%

Step-by-step explanation:

For this case we have a random variable with the following parameters:

X \sim N(\mu = 34, \sigma=2.5)

From the empirical rule we know that within one deviation from the mean we have 68% of the values, within two deviations we have 95% and within 3 deviations we have 99.7% of the data.

We want to find the following probability:

P(34 < X

We can find the number of deviation from the mean with the z score formula:

z= \frac{X -\mu}{\sigma}

And replacing we got

z= \frac{34-34}{2.5}= 0

z= \frac{39-34}{2.5}= 2

And we want the probability from 0 to two deviations above the mean and we got 95/2 = 47.5 %

For the second case:

P(X

z= \frac{31.5-34}{2.5}= -1

So one deviation below the mean we have: (100-68)/2 = 16%

For the third case:

P(29 < X

And replacing we got:

z= \frac{29-34}{2.5}= -2

z= \frac{36.5-34}{2.5}= 1

For this case below 2 deviation from the mean we have 2.5% and above 1 deviation from the mean we got 16% and then the percentage between -2 and 1 deviation above the mean we got: (100-16-2.5)% = 81.5%

7 0
3 years ago
Catarina is buying supplies for a party. She plans to spend at least $100 on food and at least $50 on party favors. She can spen
harkovskaia [24]

Answer:

food \geq 100

favors \geq 50

total \leq 250

3 0
3 years ago
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