1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
s344n2d4d5 [400]
4 years ago
9

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

Mathematics
2 answers:
Marizza181 [45]4 years ago
6 0

Answer:

Step-by-step explanation:

djyliett [7]4 years ago
5 0
x^2 + 7x + 8 = 0\\ \\a=1, \ b=7 ,\ c=8 \\ \\ x_{1}=\frac{-b-\sqrt{b^2-4ac}}{2a}=\frac{-7-\sqrt{7^2-4 \cdot 1\cdot 8}}{2 \cdot 1}=\frac{-7-\sqrt{49-32}}{2}=\frac{-7-\sqrt{17}}{2}\\ \\x_{2}=\frac{-b+\sqrt{b^2-4ac}}{2a}=\frac{-7+\sqrt{7^2-4 \cdot 1\cdot 8}}{2 \cdot 1}=\frac{-7+\sqrt{49-32}}{2}=\frac{-7+\sqrt{17}}{2}


You might be interested in
HELPPPPPPPP ASAP !!!!!!!!!!!!!!!
g100num [7]

Answer

(4x-5) = -20 (2x+8) = 2

Step-by-step explanation:

2 x − 8 = 2 2x-8=2 2x−8=2. Add 8 to both sides. Simplify 2 + 8 2+8 2+8 to 10. Divide both sides by 2. If its wrong then I’m very sorry but I’m sure this is correct.

6 0
3 years ago
B-2=1 equation solved
Maru [420]
The question isn't very clear to me but i'll try it out.
B-2=1
B=1+2
B=3
HOPE I HELPED!!!
4 0
3 years ago
Read 2 more answers
PLS HELP me ASAP FOR 11 (SHOW WORK!!)
Elodia [21]
2.5/0.2=12.5
2.5 times 12.5=31.25
The actual height of the building is 31.25 cm
7 0
3 years ago
Read 2 more answers
5. A 12-ounce jar of jam costs $2.40. A 16-ounce jar costs $4.00. What is the
scoray [572]

The difference in the cost per ounce is $0.05 per ounce

<h3>Fractions and proportion</h3>

Fractions are written as the ratio of two integers

If a 12-ounce jar of jam costs $2.40, the cost per ounce will be:

Unit cost = 2.40/12

Unit cost = $0.2

Similarly, if a 16-ounce jar costs $4.00, the price of a ounce will be:

Unit cost = 4/16

Unit cost. =$0.25

difference = $0.25 - $0.2

difference = $0.05

Hence the difference in the cost per ounce is $0.05 per ounce

Learn more on unit price here: brainly.com/question/7718596

#SPJ1

6 0
2 years ago
Slope of (5,1) and (2,7)
Iteru [2.4K]

Answer:

-2

Step-by-step explanation:

Slope formula:

    ↓

\frac{Y_2-Y_1}{X_2-X_1}=\frac{Rise}{Run}

Y_2=7\\Y_1=1\\X_2=2\\X_1=5\\

\frac{7-1}{2-5}=\frac{6}{-3}=\frac{6\div-3}{-3\div-3}=\frac{-2}{1}=-2

<em>Therfore the slope is -2.</em>

<em />

<em>-2 is the correct answer.</em>

<em />

<em>I hope this helps you, and have a wonderful day!</em>

4 0
3 years ago
Read 2 more answers
Other questions:
  • Represent the following algebraically. A number, x, decreased by the sum of 2x and 5
    7·1 answer
  • A, B, C, and D have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. Which sentence about the points is tr
    6·2 answers
  • Find the secant of angle B. HELP ASAPPP
    13·2 answers
  • 1. You are choosing a movie from your friend’s movie collection. You can choose 1 of 4 comedies, 1 of 5 dramas, or 1 of 3 classi
    7·1 answer
  • Which statement describes a disadvantage of Marnie paying a bill by telephone with a credit card or a debit card? Marnie will no
    11·2 answers
  • What is the area of the kite? A kite has a height of 10 meters and a base of 8 meters.
    10·2 answers
  • Help quick guys I need help on this and if you could show me how u got it or explain it to me that would be very nice thank you
    8·1 answer
  • A school fundraiser sells 1,200 raffel tickets each ticket costs 2 there is one grand prize worth 100 and 5 smaller prizes 20eac
    5·1 answer
  • Estimate 7719/52 by first rounding each number so that it has only 1 nonzero digit.
    13·1 answer
  • How do you graph 3x= -135
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!