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3 years ago

A student received a coupon for 11% off the total purchase price at a clothing store. Let z be the

Mathematics

1 answer:

Gnom [1K]3 years ago

6 0

Answer: 0.89z

Think of it like 100% - 11% = 89%

You save 11%, so you need to pay the remaining 89%

Taking 89% of z then leads to 0.89z

So that's why z - 0.11z = 0.89z

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Please help. I have no idea how to do this. Find the measure of

vagabundo [1.1K]

m∠A = 40

Step-by-step explanation:

Given AB =AC and m∠B = 70

Since AB =AC , Triangle ABC is an isosceles Triangle and the corresponding angles B and C are equal.

So m∠B = m∠C = 70

The sum of the 3 Angles of a triangle is 180°.

=> m∠A + m∠B + m∠C = 180

=> 140 + m∠C = 180

=> m∠C = 40

Hence the answer is m∠C = 40

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3 years ago

Describe the error(s) that occurred and show the correct solution.

RideAnS [48]

Answer:

$-x^{2}+4x$

Step-by-step explanation:

we have

$(x^{2}+x)-(2x^{2} -3x)$

step 1

Eliminate the parenthesis

$x^{2}+x-2x^{2} +3x$

The symbol of the term 3x is incorrect, must be positive instead of negative

$-(-3x)=+3x$

Group terms that contain the same variable

$(x^{2}-2x^{2})+(x+3x)$

Combine like terms

$-x^{2}+4x$

6 0

3 years ago

Find the mean, median, mode, and range of the data set.

VikaD [51]

Mode: 23

Range: 9

Median: 25.5

Mean: 25.5625

5 0

3 years ago

20% of the students were going to the movies this weekend. 15 students were going to the movies. How many students are there tot

Liono4ka [1.6K]

Answer: 75
15 multiplied by 5 (how many times it takes 20 to get to 100) gives us 75 :)

6 0

3 years ago

Read 2 more answers

Write the ratio as a fraction, a decimal, and a percent.<br> 51:75

irina [24]

51:75

This is the same as 51/75.

Simplify by dividing 3 to the numerator and denominator:

17/25

Divide this to get a decimal:

17 / 25 = 0.68

Now multiply by 100 to get a percent:

0.68 * 100 = 68%

6 0

3 years ago