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3 years ago

Which of the following is a typical number of books one student checked out?

Mathematics

1 answer:

Verdich [7]3 years ago

3 0

Answer:

which answer choices ?

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An athlete knows that when she jogs along her neighborhood greenway, she can complete the route in 10 minutes. It takes 20 minu

IgorLugansk [536]

Answer:

10 miles per hour.

Step-by-step explanation:

Let x represent athlete's walking speed.

We have been given that her jogging rate is 5 mph faster than her walking rate, so athlete's jogging speed would be $x+5$ miles per hour.

$\text{Distance}=\text{Rate}\cdot \text{Time}$

10 minutes = 1/6 hour.

20 minutes = 1/3 hour

While walking, we will get $D_{\text{walking}}=x\frac{\text{miles}}{\text{hour}}\cdot \frac{1}{3}\text{hour}$

$D_{\text{walking}}=\frac{x}{3}$

While jogging, we will get $D_{\text{jogging}}=(x+5)\frac{\text{miles}}{\text{hour}}\cdot \frac{1}{6}\text{hour}$

$D_{\text{jogging}}= \frac{(x+5)}{6}$

Since athlete is covering same distance while walking and jogging, so we can equate both expressions as:

$\frac{x}{3}=\frac{x+5}{6}$

Cross multiply:

$6x=3x+15$

$6x-3x=15$

$3x=15$

$\frac{3x}{3}=\frac{15}{3}\\\\x=5$

Therefore, athlete's walking speed is 5 miles per hour.

Jogging speed: $x+5\Rightarrow 5+5=10$

Therefore, athlete's jogging speed is 10 miles per hour.

3 0

3 years ago

What is the total number of servings the modified recipe will make?

Digiron [165]

9514 1404 393

Answer:

B. 4

Step-by-step explanation:

Equating exponents, we have ...

2x +7 = 15

2x = 8 . . . . . subtract 7

x = 4 . . . . . . divide by 2

The equation is true when the value of x is 4.

5 0

2 years ago

Read 2 more answers

F(x)= x/x-7<br> What is the domain of f?

Dmitry [639]

Answer:

(-∞,7) U (7,∞)

Step-by-step explanation:

All real values of x such x ≠ 7

7 0

3 years ago

A domain of [-4, -2, 1

UNO [17]

what???????

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5 0

3 years ago

Lalo has 1,500 minutes per month on his cell phone plan. How many more minutes can he use if he has already talked for 785 minut

Ket [755]

Answer:

715 minutes

Step-by-step explanation:

we know that

To find out how many more minutes he can use, subtract the number of minutes he has already talked from the number of minutes of his plan

Let

x -----> the number of minutes of his plan

y -----> he number of minutes he has already talked

$x-y$

we have

$x=1,500\ min\\y=785\ min$

substitute

$1,500-785=715\ min$

4 0

3 years ago