All categories

2 years ago

How long does it take to drive 40 miles if you are going 40 mph

Mathematics

2 answers:

Degger [83]2 years ago

8 0

Answer:

Step-by-step explanation:

d = r/t

d = 40/40

d = 1 hour

Thepotemich [5.8K]2 years ago

3 0

Step-by-step explanation:

just think : what does 40 mph mean ?

it stands for

40 miles per hour

it means with that speed you will drive 40 miles in 1 hour.

20 miles in 1/2 hour.

80 miles in 2 hours and so on.

you always have to multiply both sides of the ratio with the same factor to keep the ratio itself unchanged.

so, as per the definition, it takes 1 hour to drive 40 miles when going 40 mph.

You might be interested in

What is four plus eight

WINSTONCH [101]

Answer:

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

1 3/8 + 3 2/8 =<br><br> pls help me i have been on this for way to long

andrew11 [14]

Answer:

4.625

Step-by-step explanation:

4.625 Your welcome :)

4 0

3 years ago

Read 2 more answers

alpha and beta are the zeros of the polynomial x^2 -(k +6)x +2(2k -1). Find the value of k if alpha + beta = 1/2 alpha beta(ITS

serious [3.7K]

Answer:

$k=\frac{-11}{2}$ .

Step-by-step explanation:

We are given $\alpha$ and $\beta$ are zeros of the polynomial $x^2-(k+6)x+2(2k-1)$ .

We want to find the value of $k$ if $\alpha+\beta=\frac{1}{2}$ .

Lets use veita's formula.

By that formula we have the following equations:

$\alpha+\beta=\frac{-(-(k+6))}{1}$ (-b/a where the quadratic is ax^2+bx+c)

$\alpha \cdot \beta=\frac{2(2k-1)}{1}$ (c/a)

Let's simplify those equations:

$\alpha+\beta=k+6$

$\alpha \cdot \beta=4k-2$

If $\alpha+\beta=k+6$ and $\alpha+\beta=\frac{1}{2}$ , then $k+6=\frac{1}{2}$ .

Let's solve this for k:

Subtract 6 on both sides:

$k=\frac{1}{2}-6$

Find a common denominator:

$k=\frac{1}{2}-\frac{12}{2}$

Simplify:

$k=\frac{-11}{2}$ .

7 0

3 years ago

Which number should each side of the equation 2/3x= 10 be multiplied by to produce the equivalent equation of x= 15

Marina86 [1]

You should times each side by 3/2, so your answer is C.

6 0

3 years ago

Read 2 more answers

For questions 1 and 2, use the diagram below.

DanielleElmas [232]

1) it's just 360 divided by 8 sectors = 45 degrees (answer B)
2) (180-45)/2 = 67.50 (answer D is the nearest)

6 0

3 years ago

Read 2 more answers