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
KatRina [158]
3 years ago
15

Help it's timed.

Mathematics
2 answers:
I am Lyosha [343]3 years ago
7 0

Answer:

S=\left \{ -7\sqrt{2},7\sqrt{2} \right \}

(x = Plus or minus 2 StartRoot 7 EndRoot)

Step-by-step explanation:

Since b=0, we can simply operate it this way:

98-x^{2}=0\Rightarrow 98=x^{2}\Rightarrow \sqrt{98}=\sqrt{x^{2}}\Rightarrow \sqrt{2*7^{2}}=x\Rightarrow x=\pm 7\sqrt{2}\\S=\left \{ -7\sqrt{2},7\sqrt{2} \right \}

densk [106]3 years ago
4 0

98 - x² = 0

x² = 98

x = ±√98

Lets factor 98

98 | 2

49 | 7

7 | 7

1

So, 98 = 2 . 7 . 7 = 2 . 7²

x = ±√2.7²

x = ±7√2

You might be interested in
HEEEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPPP WITH ANSWER PLZZZZ
earnstyle [38]
First, find the area of each of the prisms sides

5 by 5.5 = 27.5

3 by 5.5 = 16.5

4 by 3 cut in half = 6 (theres 2 of thoses so 12)

4 by 5.5 = 22

Add up the products and the surface area is 78 units

Post brainliest if this helped :)
4 0
3 years ago
The binomial (x + 5) is a factor of x2 + 8x + 15. What is<br> the other factor?
puteri [66]

Answer:

x+3

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
In a study of cell phone usage and brain hemispheric​ dominance, an Internet survey was​ e-mailed to 6977subjects randomly selec
kirza4 [7]

Answer:

Given :An Internet survey was​ e-mailed to 6977 subjects randomly selected from an online group involved with ears. There were 1337 surveys returned.

To Find : Use a 0.01 significance level to test the claim that the return rate is less than​ 20%.

Solution:

n = 6977

x = 1337

We will use one sample proportion test

\widehat{p}=\frac{x}{n}

\widehat{p}=\frac{1334}{6977}

\widehat{p}=0.1911

We are given that the claim is the return rate is less than​ 20%.

H_0:p=0.2\\H_a:p

Formula of test statistic = \frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}

                                       = \frac{0.1911-0.2}{\sqrt{\frac{0.2(1-0.2)}{6977}}}

                                       = −1.858

Refer the z table

P(z<-1.85)=0.0332

Significance level = 0.01=α

Since p value > α

So, we accept the null hypothesis .

So,the claim that the return rate is less than​ 20% is false.

7 0
2 years ago
What percent of 600 is 12
Hitman42 [59]
<span>What percent of 600 is 12?
In order to get what percent of 600 is 12, we need to formulate the equation.

12 = ___ * 600
12 = 600P
P = 12 / 600 
P = 0.02

Percentage must be in hundred. So multiply 0.02 by 100
= 0.02 * 100
= 2%

So, 2% of 600 is equal to 12.</span>
7 0
2 years ago
An empty tank is being filled with water at the rate of 75 gallons per minute. In 1 hour, the tank is half full. What is the ful
ehidna [41]
9000 gallons no?? 75x120
6 0
3 years ago
Other questions:
  • Which of the following is the number of zeros in the cube of 900​
    12·1 answer
  • 304001 in expanded form
    8·1 answer
  • Please help. I will reward brainly
    13·2 answers
  • What is a synthetic division used for
    12·1 answer
  • Help please...I'll do anything...
    7·1 answer
  • Simplify (8^4/10^4)^-1/4using rational exponents
    9·1 answer
  • If the ribosomes were not working properly then your cell would not be producing proteins. If your cell did not produce proteins
    10·1 answer
  • Find the domain and range of the function f(x) = 5x – 41 + 3
    11·1 answer
  • The area of a rectangle is 60 square inches.
    15·1 answer
  • What is the answer to this question
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!