2 years ago

If a = 7 and b = 2, find the value of a - b

Mathematics

2 answers:

Mrac [35]2 years ago

5 0

$a - b \\ = 7 - 5 =2$

lukranit [14]2 years ago

3 0

7 - 2 = 5
:)))))))))))))

You might be interested in

A hiker averages 3/8 kilometers per hour. If he hikes for 1/3 hours, how many kilometers does he hike?

balandron [24]

Answer: 1/8 km

Step-by-step explanation:

3/8 * 1/3 = 1/8

5 0

2 years ago

Solve by substitution y=2x-1 y=3x+1

kupik [55]

Answer: x = -2

Step-by-Step Explanation:

Since the two expressions both equal y, you can set them equal to each other.

2x-1 = 3x+1

Subtract 2x from both sides.

-1 = x+1

Subtract 1 from both sides.

-2 = x

3 0

2 years ago

Please help me do number One

valentina_108 [34]

What are the options on top take a picture of those then I will be able to help you

4 0

2 years ago

The mean amount spent by a family of four on food is $500 per month with a standard deviation of $75. Assuming that the food cos

Alexeev081 [22]

Answer:

$z=\frac{x- \mu}{\sigma}$

And replacing we got:

$z=\frac{425-500}{75}= -1$

And we can calculate this probabilit using the normal standard distribution or excel and we got:

$P(z$

Step-by-step explanation:

If we define the random variable of interest "the amount spent by a family of four of food per month" and we know the following parameter:

$\mu = 500, \sigma = 75$

And we want to find the following probability:

$P(X$

And we can use the z score formula given by:

$z=\frac{x- \mu}{\sigma}$

And replacing we got:

$z=\frac{425-500}{75}= -1$

And we can calculate this probabilit using the normal standard distribution or excel and we got:

$P(z$

5 0

2 years ago

By what percent (%) will a fraction change if its numerator is decreased by 10% and its denominator is decreased by 70%?

grandymaker [24]

Answer: 200% increase

7 0

2 years ago

If a = 7 and b = 2, find the value of a - b​

If a = 7 and b = 2, find the value of a - b