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3 years ago

-6+3x=9 i need a answer

Mathematics

1 answer:

adell [148]3 years ago

7 0

Answer:

$x = 5$

Step-by-step explanation:

Isolate then solve for x

$3x = 9+6\\3x = 15\\x = \frac{15}{3} \\x = 5$

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Your friend claims the uneven parallel bars in gymnastics are not really parallel. She says one is higher than the other, so the

Soloha48 [4]

Answer:

Step-by-step explanation:

Because parrallel means they will never intersect so there for i got B. Hope i was helpful.

3 0

3 years ago

Q1. Ned washes dishes at a constant rate. Ned can hand-wash 18 dirty dishes in 3 minutes. Choose the graph that best represents

vladimir1956 [14]

Answer:

Graph A

Step-by-step explanation:

As we know, in 3 minutes he washes 18 dishes. Without even doing any math, you can see that this is the only graph that represents that. The others show that he washes two dishes in 12 minutes, which doesn’t make sense.

8 0

3 years ago

what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed

kramer

Answer:

$P(x \le 21) = 0.69146$

Step-by-step explanation:

The missing parameters are:

$n = 64$ --- population

$\mu = 20$ --- population mean

$\sigma = 16$ -- population standard deviation

Required

$P(x \le 21)$

First, calculate the sample standard deviation

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{16}{\sqrt {64}}$

$\sigma_x = \frac{16}{8}$

$\sigma_x = 2$

Next, calculate the sample mean $\bar_x$

$\bar x = \mu$

So:

$\bar x = 20$

So, we have:

$\sigma_x = 2$

$\bar x = 20$

$x = 21$

Calculate the z score

$x = \frac{x - \mu}{\sigma}$

$x = \frac{21 - 20}{2}$

$x = \frac{1}{2}$

$x = 0.50$

So, we have:

$P(x \le 21) = P(z \le 0.50)$

From the z table

$P(z \le 0.50) = 0.69146$

So:

$P(x \le 21) = 0.69146$

4 0

3 years ago

Marta’s fruit stand sold x oranges on Thursday and twice as many on Friday. All together, on both days, she sold 108. Which bar

Allushta [10]

Step-by-step explanation:

Thursday = x

Friday = 2x (Since thursday is x and she landed up selling twice the amount she did on thursday, friday would be 2x)

Thursday + Friday = 108

For this problem you would need to find the value of x so you would need to substitute x into the equation that was created for the oranges sold on both the days

Thursday + Friday = x+2x = 108

x +2x = 108

3x = 108

x = 108/3

x= 36

Since x is thursday, Marta sold 36 oranges on thursday

To find the amount of oranges sold on friday you would need to multiply x, which is 36, by 2

2x = 2(36) = 72

72 oranges were sold on friday

Hope this helps!!!

5 0

3 years ago

Read 2 more answers

If a rectangle is (x+2) wide and (x-7) in length, the area of the rectangle is?

Maru [420]

Answer: x² - 5x - 14

Step-by-step explanation: Start with the formula for the area of a rectangle.

Area = length x width

To multiply these two binomials, let's use the F.O.I.L. method.

The product of the first terms is x².

The product of the outer terms is -7x.

The product of the inner terms is 2x.

The product of the last terms is -14.

So we have x² - 7x + 2x - 14 which simplifies to x² - 5x - 14.

3 0

4 years ago