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sergeinik [125]
3 years ago
15

I don't understand math at all. Please help!! Can you break this problem down step by step?

Mathematics
1 answer:
kipiarov [429]3 years ago
6 0
X² + 4x - 8 = 5

This is a simple quadratic equation. Let's move everything to the left side to start:
x² + 4x - 8 - 5 = 5 - 5

Now we have:
x² + 4x - 13 = 0

In a quadratic equation, x = \frac{-b +-  \sqrt{b^{2} -4ac} }{2a}

Therefore, we plug in a = 1, b = 4, and c = -13, and we find that x = -2 - sqrt{17} OR -2 + sqrt{17}.

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What would you have to get to have 7 times 12 times blank equal 28,000
Dafna1 [17]

Answer:

333 (rounded answer) Fraction answer: 333 1/3

Step-by-step explanation:.

Use the variable n for the missing value.

7 x 12 x n = 28,000

84n = 28000

Divide both sides by 84.

n = 333.33333....

n = 333 (rounded.)

7 0
4 years ago
Dr. Wellbee advised his patients to drink 8 eight-ounce glasses of water every day for every 50 pounds of weight. If Kelby weigh
Sever21 [200]

A right triangle has a 30o angle. The leg adjacent to the 30o angle measures 25 inches.

What is the length of the other leg? Round to the nearest tenth.

14.4 in.21.7 in.28.9 in.<span>43.3 in.</span>
5 0
3 years ago
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A pennant is shaped like a right triangle with a hypotenuse of 10feet. The length of one side of the pennant is two feet longer
marissa [1.9K]

Answer:

6 ft and 8 ft

Step-by-step explanation:

let x be the length of one leg then (x + 2) is the other leg.

Using Pythagoras' identity in the right triangle, that is

x² + (x + 2)² = 10² ← expand left side and simplify

x² + x² + 4x + 4 = 100 ( subtract 100 from both sides )

2x² + 4x - 96 = 0 ( divide all terms by 2 )

x² + 2x - 48 = 0 ← in standard form

(x + 8)(x - 6) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 8 = 0 ⇒ x = - 8

x - 6 = 0 ⇒ x = 6

But x > 0 ⇒ x = 6

Thus the 2 sides are 6 ft and x + 2 = 6 + 2 = 8 ft

6 0
4 years ago
A ball is thrown into the air with an upward velocity of 48 ft/s. Its height h in feet after t seconds is given by the function
stiv31 [10]
The answer to this, your question is                                                                               h = -16t • 2 + 48t + 6
h = -32t + 48t + 6
h = 16t + 6     HOPE I HELPED IN A WAY!                                                                                                                                             ~Marcey<3
7 0
3 years ago
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A cube is a special right rectangular prism with congruent sides. If a block of cheese is shaped like a cube with a length of 7
Hoochie [10]

Volume of a cube is s^3, where s is the length of a side.

Volume = 7 ^3

Volume = 343 cubic inches.

8 0
3 years ago
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