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
VladimirAG [237]
3 years ago
6

Simply the problem.

Mathematics
2 answers:
Marat540 [252]3 years ago
6 0

Answer:

C

Step-by-step explanation:

\sqrt{3}\cdot\sqrt{21}= \\\\\sqrt{3\cdot 21}= \\\\\sqrt{63}= \\\\3\sqrt{7}

Therefore, the correct answer is choice C. Hope this helps!

zlopas [31]3 years ago
4 0

Answer:

3√7

Step-by-step explanation:

√3×√21=√63

√63=√7×√9=√7 × 3

=3√7

You might be interested in
Y = 2x + 4<br> 6x – 3y = -12<br> System by substitution 10 points
Burka [1]

Answer:

(-2, 0)

Step-by-step explanation:

y = 2x+4

6x - 3y = -12

Start by simplifying the second equation by dividing everything by 3 (this will make the math easier)...

2x - y = -4

Then, substitute 2x+4 for y into the second equation (this is because y = 2x+4)...

2x-3(2x+4)=-4

Distribute the -3

2x-3(2x)-3(4)=-4

2x-6x-12=-4

Combine like terms

-4x-12=-4

Add 12 to both sides

-4x-12+12=-4+12

-4x=8

Divide both sides by -4

x=-2

Plug -2 back in for x to solve for y:

y = 2(-2) + 4

y=-4+4

y=0

(x, y) = (-2, 0)

5 0
3 years ago
Read 2 more answers
A dressmaker bought 2/5 meter of yellow cloth, 1/3 meter of blue cloth and 1/6 meter of red cloth to make a dress for her daught
kvv77 [185]

Answer:

a. The total length of cloth that the dressmaker bought.

b. 2/5 m, 1/3 m, 1/6 m

c. Addition of fractions

Step-by-step explanation:

Step 1. Get the LCD or least common denominator which is in this case 30.

Step 2. Transform each fraction into similar fractions having the same denominator.

12/30, 10/30, 5/30

Step 3. Add now the similar fractions and simplify to lowest terms

27/30 ÷3 = 9/10

I hope it helps :)

4 0
2 years ago
A sample of 900900 computer chips revealed that 66f% of the chips fail in the first 10001000 hours of their use. The company's p
Alik [6]

Answer:

No, there is not enough evidence at the 0.02 level to support the manager's claim.

Step-by-step explanation:

We are given that the company's promotional literature states that 68% of the chips fail in the first 1000 hours of their use. Also, a sample of 900 computer chips revealed that 66% of the chips fail in the first 1000 hours of their use.

And the quality control manager wants to test the claim that the actual percentage that fail is different from the stated percentage, i.e;

Null Hypothesis, H_0 : p = 0.68 {means that the actual percentage that fail is same as the stated percentage}

Alternate Hypothesis, H_1 : p  0.68 {means that the actual percentage that fail is different from the stated percentage}

The test statistics we will use here is;

     T.S. = \frac{\hat p -p}{\sqrt{\frac{\hat p(1- \hat p)}{n} } } ~ N(0,1)

where, p = actual percentage of chip fail = 0.68

            \hat p = percentage of chip failed in a sample of 900 chips = 0.66

           n = sample size = 900

So, Test statistics = \frac{0.66 -0.68}{\sqrt{\frac{0.66(1- 0.66)}{900} } }

                             = -1.267

Now, at 0.02 significance level, the z table gives critical value of -2.3263 to 2.3263. Since our test statistics lie in the range of critical values which means it doesn't lie in the rejection region, so we have sufficient evidence to accept null hypothesis.

Therefore, we conclude that the actual percentage that fail is same as the stated percentage and the manager's claim is not supported.

5 0
3 years ago
Is there a shortcut when you're trying to find the total on a percent of increase problem? (think finding the total amount due a
umka2103 [35]

Answer:

Denote:

Original amount: P

Rate: R (rate might be positive or negative number)

The total amount after considering rate:

TA = P +/- P x R = P(1 +/- R)

This might be the shortcut you are looking for.

Hope this helps!

:)

7 0
3 years ago
PLSS HELP NO BOTS!!!!
inn [45]

Answer:

x = 3; y = 11

Step-by-step explanation:

The quadrilateral is a parallelogram if both pairs of opposite sides are congruent.

3y - 9 = 2y + 2

y = 11

3x + 6 = y + 4

3x + 6 = 11 + 4

3x = 15 - 6

3x = 9

x = 3

Answer: x = 3; y = 11

5 0
2 years ago
Read 2 more answers
Other questions:
  • Find the future value of the annuity due for $200 deposited at the beginning of each quarter for 12 years at 7% compounded quart
    14·1 answer
  • Is 1.68 greater than 1.680
    8·1 answer
  • PLEASE ANSWER ASAP 50 POINTS AND WILL GIVE BRAINLIEST
    12·2 answers
  • Why is sin 10= cos 80
    15·1 answer
  • Lisa is 10 cm taller than her friend ian. Ian is 14 cm taller than jim. Every month, their heights increase by 2 cm. In 7 months
    12·2 answers
  • What is the approximation of pi to the nearest hundredth ?
    9·1 answer
  • PLEASE HELP! WILL MARK BRAINLIEST IF U ANSWER CORRECTLY! IF WRONG U WONT GET IT
    9·1 answer
  • What is 43/10 as a mixed number
    6·2 answers
  • Kevin wants to purchase a new car that costs $10,000. Every week he saves up $250. It has been 30 weeks. How much money does he
    5·1 answer
  • The ratio of the measures of the acute angles of a right triangle is $8:1$. In degrees, what is the measure of the largest angle
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!