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solong [7]
4 years ago
11

5x (x+8)= - 7 quadratic or not? explain, ​

Mathematics
1 answer:
mote1985 [20]4 years ago
6 0

Answer:

Step-by-step explanation:

Yes it is a quadratic equation

5x^2 + 40x = -7

5x^2 + 40x + 7 = 0

a = 5

b = 40

c = 7

-40/10 <u>+</u> (sqrt(1600 - 4(5)(7)))/10

-4 <u>+</u> (sqrt(1600-160))/10

-4 <u>+</u> (sqrt(1440))/10

-4 <u>+</u> 12(sqrt(10))/10

-4 <u>+</u> 6/5(sqrt(10))

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What percent of 365 is 146? Also how do you get the answer thanks :)
EleoNora [17]
Percent literally means per one-hundred so:

365(p/100)=146  multiply both sides by 100

365p=14600 divide both sides by 365

p=40%
8 0
3 years ago
Not sure if i got this right?
aleksandrvk [35]

Answer:

The effect it will have on the volume is;

The volume will be 8 times larger

Step-by-step explanation:

The dimensions of the given prism are;

The length of the prism, l = 5 in.

The breadth of the prism, b = 5 in.

The slant height of the prism,  = 4 in. by 5 in.

The height of the prism, h = 7 in.

The shape of the prism = Parallelepiped

The volume of a parallelepiped = Area of Base × Height of the prism

The base area of the parallelepiped = The length × Breadth of the parallelepiped

∴ The base area of the given parallelepiped = 5 in. × 5 in. = 25 in.²

The volume of the given parallelepiped, V₁ is found as follows;

V₁ = 5 in. × 5 in. × 7 in. = 25 in.² × 7 in. = 175 in.³

When a scale factor of 2 in applied to the dimensions of the prism, we have;

The new volume, V₂ =  2 × 5 in. × 2 × 5 in. × 2 × 7 in.

∴ V₂ = 2 × 2 × 2 × 5 in. × 5 in. × 7 in. = 8 × 5 in. × 5 in. × 7 in. = 8 × V₁

Therefore;

V₂ = 8 × V₁

The volume of the image of the object, V₂ after applying a scale factor of 2 is 8 times larger than the volume of the object, V₁.

5 0
3 years ago
What is the measure of B?
bekas [8.4K]

Answer:

m∠B= 60°

Step-by-step explanation:

The given triangle has all sides equal, so it's an equilateral triangle.

Equilateral triangle is always equal to 60°

Therefore, m∠B= 60°.

~

8 0
2 years ago
(-12,17),(5,3) find the slope of the line through each pair of points
tekilochka [14]

Answer:

Slope is:

(3-17)/(5 - -12)

-14/17

3 0
3 years ago
A pair of boots are $94.99. They are 25% off. With this discount, what is the sale price?
san4es73 [151]

Answer:

94.99 - 23.7475 = 71.24 dollars.

Step-by-step explanation:

7 0
3 years ago
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