2 years ago

Question 20 (5 points)

Mathematics

1 answer:

Sloan [31]2 years ago

3 0

Answer:

Question 20 3 < c < 9

Question 21 2.5

Step-by-step explanation:

hope this helps u

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Kenny is taller then lamest

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3 years ago

Use the Quadratic Formula to find the exact solutions of x2 + 7x - 4 = 0.

sladkih [1.3K]

Answer:

The solution of equation $x^2+7x-4=0$ is 0.53,-7.53.

Step-by-step explanation:

Given : Quadratic equation $x^2+7x-4=0$

To find : The solution of equation ?

Solution :

The solution of the quadratic equation $ax^2+bx+c=0$ is $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Here, a=1, b=7 and c=-4.

Substitute the values,

$x=\frac{-7\pm\sqrt{7^2-4(1)(-4)}}{2(1)}$

$x=\frac{-7\pm\sqrt{65}}{2}$

$x=\frac{-7+\sqrt{65}}{2},\frac{-7-\sqrt{65}}{2}$

$x=0.53,-7.53$

Therefore, the solution of equation $x^2+7x-4=0$ is 0.53,-7.53.

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2 years ago

Harry has a cable the cable has a length of 16 meters harry cuts the cable into two parts, part A and part B the length of part

Veronika [31]

Answer:

17.6 kg

Step-by-step explanation:

5 meters = 8 kg

8/5 = 1.6 kg per meter

16-5 = 11

11*1.6 = 17.6 kg

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3 years ago

I'll pay someone to do my math <3

ss7ja [257]

I would like to be paid, then xD

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2 years ago

Fill in the blank 1.05 assignment

Neko [114]

Answer -4x

Step-by-step explanation:

distribute the x to 5x and -4

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3 years ago

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