3 years ago

15xy - 4 + 2xy -7xy - 1

Mathematics

1 answer:

Eduardwww [97]3 years ago

6 0

Answer:

10xy-5

Step-by-step explanation:

15xy-4+2xy-7xy-1 is the given expression.

I assume the directions say to simplify.

Group the xy terms together and group the constants together.

15xy+2xy-7xy-4-1

This is a demonstration of the commutative property.

Now I will use the distributive property to rewrite the first 3 terms as a multiplication:

(15+2-7)xy-5

10xy-5

You might be interested in

Please help me !!! what’s the answer ?

diamong [38]

Answer:

negtive 1

Step-by-step explanation:

4 0

2 years ago

The average cost of an IRS Form 1040 tax filing at Thetis Tax Service is $138.00. Assuming a normal distribution, if 77 percent

jek_recluse [69]

Answer:

22.97

Step-by-step explanation:

Given that the average cost of an IRS Form 1040 tax filing at Thetis Tax Service is $138.00.

Let x be the average cost an IRS Form 1040 tax filing at Thetis Tax Service

$P(X$ is given

From std normal distribution table we find 77th percentile z value.

z=0.74

Corresponding X value = 155

i.e. $0.74=\frac{155-138}{s}$ where s is the std deviation

Simplify to get

Std deviation = $\frac{17}{0.74} \\=22.97$

8 0

3 years ago

1/3+2/5= <br> what does this equal in a fraction form

SVEN [57.7K]

Answer:

11/15

hope this helps

have a good day :)

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

The sum of double a number and 8

olya-2409 [2.1K]

The answer is 10...............

8 0

3 years ago

If your test increased by 14 points, what percent did you increase if there were 50 questions in total? show work

solmaris [256]

Increase = 14
Total =50
Percentage increase = 14/50 x 100 = 28%

8 0

3 years ago

15xy - 4 + 2xy -7xy - 1​

15xy - 4 + 2xy -7xy - 1