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3 years ago

What is the answer for question #8

Mathematics

1 answer:

Karo-lina-s [1.5K]3 years ago

6 0

Answer:

Step-by-step explanation:

5 + 1 = 6 + 8.

Here how I explain it, You are adding each number to get you answer but.

6 + 8= 14

So that's how you get your answer.

Draw a picture then you will understand.

If you don't just tell me.

By kake fam and Kzamor

Hope this help :)

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If 3x2 – 2x + 7 = 0, then (x – 1/3)^2=

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I'm not sure but I think the answer might be, (3x-1)^2/9

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3 years ago

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Find the value of X 9x+7 -3x+20

crimeas [40]

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2.) 17x i believe those are the answers

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2 years ago

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3 years ago

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When they are both racing on hoverboards, Victoria is 3 times as fast as her brother Max. When she is on foot, she is 3 times sl

NARA [144]

Answer:

Race completed in 48 minutes.

Step-by-step explanation:

Let the speed of Max on hoverboard is = x

Then as per question speed of Victoria on hoverboard = 3x

Now it has been given in the question that speed of Victoria on foot is 1/3 of the speed of Max on hoverboard that will be = x/3

Now we will form the equation.

As we know the formula speed = distance/time

Let the time taken by both to complete the race be t minutes.

Distance covered by Victoria in 12 minutes + Distance covered by Victoria on foot = distance covered by Max on hoverboard

Then the equation will be

12(3x)+(1/3)x(t-12)=xt

$36x+\frac{xt}{3}-4x=xt$

$x(36+\frac{t}{3}-4)=xt$

$36+\frac{t}{3}-4=t$

$32=t-\frac{t}{3}$

$\frac{2t}{3}=32$

$t=\frac{(32)3}{2}=48$

So 48 minutes it took to complete the race.

4 0

2 years ago

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PRACTICE ANOTHER The administration of a large university wants to take a random sample to measure student opinion of a new food

Reil [10]

Answer:

81 samples

Step-by-step explanation:

According to the empirical rule :

Possible values of the sample mean is within 3 standard deviations of the population mean :

μ ± 3 sd(x) ; sd(x) = standard deviation of sampling distribution.

3 * sd(x) = 1

sd(x) = 1/3

Recall:

Standard deviation of sampling distribution, sd(x)

sd(x) = σ / sqrt(n)

1/3 = 3 / sqrt(n)

Square both sides

1/9 = 9/n

Cross multiply :

n * 1 = 9 * 9

n = 81

3 0

2 years ago