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OleMash [197]
3 years ago
7

Simplify (7x - 7)(x + 1)

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
5 0

We will use the FOIL method to solve this.

(7x-7)(x+1)

Multiply 7x by x. Then, multiply 7x by 1. Then, multiply -7 by x. Then, Multiply -7 by 1.

7x^{2} + 7x - 7x -7

Now, we need to simplify by combining like terms.

7x^{2} -7

If you look, -7x and 7x are gone. This is because they cancel each other out.

I hope this helped and maybe consider giving me brainliest :)

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A line that includes the point (10,–5) has a slope of 7. What is its equation in point-slope form?
sleet_krkn [62]
Y+5=7(x-10)
Hope this helps
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Caitlin has a movie rental card worth $175.After she rents the first movie ,the card's value is $172.25. Aftershe rents the seco
dedylja [7]
The answer to this question is 175 - n x 2.75
4 0
3 years ago
Jocelyn said that the triangle below is not a right triangle. Her work is shown below. Explain what she did wrong and show Jocel
AfilCa [17]

Complete Question:

Jocelyn said that the triangle below is not a right triangle. Her work is shown below. Explain what she did wrong, and show Jocelyn the correct solution.

We need to check if 27² + 45² = 36² is a true statement. The left side of the equation is equal to 2,754. The right side of the equation is equal to 1,296. That means 272 + 452 = 362 is not true, and the triangle shown is not a right triangle

Answer/Step-by-step explanation:

Jocelyn used a wrong equation and statement.

Here's what she should have stated and done.

Using the converse of Pythagorean Theorem, which says that a triangle with sides a, b, and c is a right triangle if it satisfy the statement: a² + b² = c².

Where, c is the hypotenuse which is the longest leg. While a and b are the side lengths of the other two legs.

Therefore, in this case,

c = 45

b = 27

a = 36

Thus, what we need to check to be true would be:

36² + 27² = 45² (this is where Jocelyn made a mistake. Jocelyn wrote 27² + 45² = 36² rather)

Let's check if it's true.

2,025 = 2,025 (this is true)

Therefore, the triangle is a right triangle.

8 0
2 years ago
The sale price of an item is $180 after a 25% discount is applied. What is the original price of the item?
Valentin [98]
So
100%=original
25% discount
100-25=75
it is 180 sale
75%=180
find 100%

a hack is to recognize that 75/3 times 4=100 so
75%=180
divide 3
25%=60
times 4
100%=240


the real way is proportions
75:180 =100:x
75/180=100/x
multiply both sides by 180x
75x=18000
divide 75
x=240



origitnal price=$240
3 0
3 years ago
Read 2 more answers
Sarah used 2.5 cups of cheese in a dish that serves 10 people. Amyn used 1.6 cups of cheese in a dish that serves 8 people.
Drupady [299]
Is D
Explanation : you have to divide the amounts too see how many cheese for one person and then you subtract them and you get you answer that will be like this
2.5 divided by 10 = 0.25
1.6 divided by 8 = 0.2
0.25 - 0.2 = 0.05
5 0
3 years ago
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