Use the quadratic formula to solve x2 + 7x + 8 = 0. Estimate irrational solutions to the nearest tenth.

Answers

Answer 1

Answer: $x^2 + 7x + 8 = 0\n \na=1, \ b=7 ,\ c=8 \n \n x_(1)=(-b-√(b^2-4ac))/(2a)=(-7-√(7^2-4 \cdot 1\cdot 8))/(2 \cdot 1)=(-7-√(49-32))/(2)=(-7-√(17))/(2)\n \nx_(2)=(-b+√(b^2-4ac))/(2a)=(-7+√(7^2-4 \cdot 1\cdot 8))/(2 \cdot 1)=(-7+√(49-32))/(2)=(-7+√(17))/(2)$

Answer 2

Answer:

Answer:

Step-by-step explanation:

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Find the area of the blue shaded figure.25 mm
120 mm
I’m begging atp. Please help me

Answers

area of blue shaded figure = area of big circle minus small circle

radius of big circle = 60mm

area of big circle= πr² = check pic

7. 2.1 + 3.32 – 1.4 = ?

Answers

Hi there! :) The answer to your question is 4.02. I did 2.1+3.32= 5.42 then I did 5.42-1.4= 4.02. That I how I got the answer.

Hope I helped! ;D

4.02, first you add together 2.1 and 3.32, then once you get that answer (5.43); you subtract 1.4. Remember that when adding and subtracting to always go left to right.

Which of the following statements is INCORRECT?A. A triangle with three congruent sides is equiangular.
B. The Isosceles Triangle Theorem can be applied to equilateral triangles.
C. The measure of each angle of an equilateral triangle is 120°.
D. A triangle with three congruent angles is equilateral.

Answers

Answer:

Step-by-step explanation:

The measure of each angle in an equilateral triangle is $60^(\circ)$ , not $120^(\circ)$ .

You have a 5-question multiple-choice test. Each question has four choices. You don’t know any of the answers. What is the experimental probability that you will guess exactly three out of five questions correctly? Type your answer below using complete sentences.

Answers

5 questions each 4 choices guess 3 out of 5 correctly?

5*4=20 20/3=6.67 , My guess is that the outcome of you probably getting 3 / 5 correct is a 79.9 percent chance.

Solve the following equation |-5x+20|=-15 for x

Answers

Answer:

x = 7

Step-by-step explanation:

You first subtract 20 from both sides. Then you divide both sides by -5. And the resulting equation is the value of X.

|-5x + 20|= -15

- 20 -20

|-5x|= -35

___ ___

-5 -5

x = 7

Pls mark brainlyist with the crown

Find the solution of the equation 1/2x^2 -x +5=0

Answers

If you would like to solve the equation 1/2 * x^2 - x + 5 = 0, you can do this using the following steps:

1/2 * x^2 - x + 5 = 0 /*2
x^2 - 2x + 10 = 0
(x - 1)^2 + 9 = 0
1. x = 1 - 3 * i
2. x = 1 + 3 * i

The correct result would be x = 1 - 3 * i and x = 1 + 3 * i.

Other Questions

Drag an answer to each box to complete this paragraph proof.Given: Triangle ABC Prove: m∠A=72°

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Simplify. 4−16÷4+42 −16 13 15 16

Which of the following is not part of the job search preparation checklist?A. Self assessment B. Follow-up plan C. Résumé D. Fact sheet