3 years ago

Solve the following equation for x. x2 + 8x + 7 = 0

Mathematics

1 answer:

igomit [66]3 years ago

7 0

Step-by-step explanation:

x² + 8x + 7 = 0

(x + 7) (x + 1) = 0

x = -7 or -1

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A camp tent has a center pole 8feet high. The sides of the tent make an angle of 40° degrees with the ground how wide is the ten

kati45 [8]

Answer:

Step-by-step explanation:

let the distance from central pole to one end=r

8/r=tan 40°

r=8/tan40=8 cot~40°=8 cot(90-50)=8 tan ~50≈9.534

2r≈19.068≈ 19.1

width of tent=19.1 ft

8 0

3 years ago

A hot-air balloon is flying at an altitude of 2999 feet. If the angle of depression from the pilot in the balloon to a house on

Bezzdna [24]

Answer:

5668.3

Step-by-step explanation:

The problem can be represented as a right angled triangle as shown below.

The angle of depression is equivalent to the angle inside the triangle (alternate angles) and it is 34°.

The altitude of the balloon is 2999 feet. (opposite)

Using trigonometric function, SOHCAHTOA, we can solve this:

$sin(34) = \frac{opposite}{hypotenuse}\\ \\sin(34) = \frac{altitude}{distance}\\\\sin(34) = \frac{2999}{distance}\\\\distance = \frac{2999}{sin34}\\\\distance = 5668.3 feet$

The pilot is 5668.3 feet far away from the house.

4 0

4 years ago

Five times the difference of twice a number and nine is negative five. Find the number.

Ilya [14]

Answer:

x = 4

Step-by-step explanation:

Step 1: Write out the expression

5(2x - 9) = -5

Step 2: Solve for x

10x - 45 = -5

10x = 40

x = 4

4 0

3 years ago

Read 2 more answers

ILL MARK BRAINIEST IF YOU DO THIS CORRECTLY!!!

musickatia [10]

Hmmm im on the same question so i think its this

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3 years ago

Solve for A. BA + C = D 1)A = D-B-C 2)A = (D-C)/B 3)A = (C - D)B please hurry

enot [183]

I’m 95% sure the answer is 2

3 0

3 years ago