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ioda
3 years ago
5

What are the solutions to the system of equations? y=2x2−5x−7 y=2x+2

Mathematics
1 answer:
IceJOKER [234]3 years ago
5 0

Answer:

Step-by-step explanation:

y=2x²-5x-7

y=2x+2

2x²-5x-7=2x+2

2x²-7x-9=0

2x²-9x+2x-9=0

x(2x-9)+1(2x-9)=0

(2 x-9)(x+1)=0

x=9/2 ,-1

y=11 ,0

solutions are (9/2,11),(-1,0)

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Two kinds of perfume are packaged in square pyramidal bottles. Perfume A is packaged in a bottle with a base of 3 inches square
kondor19780726 [428]

Answer:

The bottle of perfume A contains more glass

Step-by-step explanation:

we know that

The surface area of the square pyramid is equal to the area of the square base plus the area of its four triangular faces

step 1

Find the surface area of Perfume A

SA=3^{2} +4[\frac{1}{2}(3)(2.5)]=24\ in^{2}

step 2

Find the surface area of Perfume B

SA=2.5^{2} +4[\frac{1}{2}(2.5)(3)]=21.25\ in^{2}

step 3

Compare the surface areas

24\ in^{2}>21.25\ in^{2}

therefore

The bottle of perfume A contains more glass

6 0
2 years ago
The equation yˆ=20646·0.86x estimates the value of a brand of car x years after it was purchased new. Milo purchased this brand
zhannawk [14.2K]

Answer:

$195311

Step-by-step explanation:

Given the expression yˆ=20646*0.86x

Given that the number years 11

And x represent the number of years

Substituting x=11 in the expression for the cost we have

yˆ=20646*0.86(11)

yˆ=20646*9.46

yˆ=20646*9.46

yˆ=195311.16

From the analysis he purchased the car fro $195311

3 0
3 years ago
What the answer is to question number 4
cestrela7 [59]
Hey there!
The answer is D. 1/5
An explanation is in the attached image below.
Hope this helps!

3 0
2 years ago
Need help explaining why this happens
Charra [1.4K]
Just like 2 squared = 4, the square root of 2 multiplied by itself will result in a product of 2. Squaring a number always means multiplying that number by the same number.
8 0
3 years ago
Which of the following is true?
gtnhenbr [62]

Answer:

C..... I think it is a answer

6 0
2 years ago
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