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solong [7]
3 years ago
11

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

Mathematics
1 answer:
mote1985 [20]3 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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Dahasolnce [82]

Let y = the distance between the top left corner and the bottom right corner

y^2 = 24^2 + 15^2

y^2 = 801

y = 3 * sqrt(89)

Now we can find x.

12^2 + x^2 = (3 * sqrt(89))^2

x^2 = 657

x = 3 * sqrt(73) or 25.63

7 0
3 years ago
Which function is represented by the graph?
Ksju [112]

Answer

a. f(x) = −2|x| + 1

6 0
1 year ago
What is the value of tan A?
Ronch [10]

For the given triangle, the tan of angle A equals \frac{3}{4} = 0.75.

Step-by-step explanation:

Step 1:

In the given triangle for angle A, the opposite side has a length of 6 cm, the adjacent side has a length of 8 cm while the hypotenuse of the triangle measures 10 cm. To calculate the tan of angle A we divide the opposite side's length by the adjacent side's length.

tan A = \frac{oppositeside}{adjacent side}.

Step 2:

The opposite side's length = 6 cm.

The adjacent side's length = 8 cm.

tan A = \frac{oppositeside}{adjacent side} = \frac{6}{8} = \frac{3}{4} = 0.75.

6 0
2 years ago
A football field is a rectangle 80 meters wide and 110 meters long. Coach Trevor asks his players to run from one corner to the
vladimir2022 [97]

Answer: the distance from one corner of the field to the other corner is 136 m

Step-by-step explanation:

The distance from one corner to the other corner is the diagonal and it

divides the field into two equal right angle triangles. The diagonal represents the hypotenuse of each right angle triangle. The length and width of the rectangle represents the adjacent and opposite sides of the right angle triangle. To determine the length of the diagonal, d, we would apply Pythagoras theorem which is expressed as

Hypotenuse² = opposite side² + adjacent side²

Therefore

d² = 110² + 80²

d² = 12100 + 6400 = 18500

d = √18500

d = 136 meters

5 0
3 years ago
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SCORPION-xisa [38]

Answer:

10^2 × 10^2

Step-by-step explanation:

Given that

Write 100 times 100 that would be multiplying  to the power by 10

So based on the above information

The equation that would be developed is

10^2 × 10^2

The same would be represented as an answer

4 0
3 years ago
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