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Natasha_Volkova [10]

3 years ago

11

What is 7 less than the product of 5 and a number?

1 answer:

sladkih [1.3K]3 years ago

3 0

Answer:

7x - 5 = 42

Step-by-step explanation: Hope this helps you!

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Pablo and max's follows a flight pattern approximatley modled by the equation h(t)=-8t^2+16t+2 where h(t)is their rocket's heigh

kodGreya [7K]

Answer: 2.11 s

Step-by-step explanation:

Given

Equation of rockets height is given by

$\Rightarrow h(t)=-8t^2+16+2$

Height will be zero once the rocket lands on the ground

So, we can write

$\Rightarrow h(t)=0\ \text{or}\ -8t^2+16t+2=0\\\Rightarrow 8t^2-16t-2=0\\\\\Rightarrow t=\dfrac{16\pm \sqrt{(-16)^2-4(8)(-2)}}{2\times 8}\\\\\Rightarrow t=\dfrac{16\pm \sqrt{320}}{16}\\\\\text{Neglecting negative value of t}\\\\\Rightarrow t=\dfrac{16+17.888}{16}=2.11\ s$

7 0

3 years ago

I dunno how to solve this!! {10th grd geometry}

irakobra [83]

the answer is 9.

ie.. the value of x =9

7 0

2 years ago

Mika is a local farmer who is interested in how often residents in her town go to a farmer's market each month. She surveys 124

TEA [102]

Answer:

The margin of error is of 0.3012, and it means that we should be 99% confident that the population mean would be within 0.3012 of the sample mean.

Step-by-step explanation:

Margin of error

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation and n is the size of the sample.

Standard deviation of 1.3

This means that $\sigma = 1.3$

She surveys 124 families

This means that $n = 124$

Margin of error and meaning:

$M = z\frac{\sigma}{\sqrt{n}}$

$M = 2.58\frac{1.3}{\sqrt{124}}$

$M = 0.3012$

The margin of error is of 0.3012, and it means that we should be 99% confident that the population mean would be within 0.3012 of the sample mean.

6 0

3 years ago

Find all values of a that make the |a|=0. enter the values of a as a comma-separated list

nikdorinn [45]

The only number equal to zero is zero.

Answer: a = 0

7 0

3 years ago

Marina86 [1]

Refer to the image attached.

Since, we have to divide the polynomial $4x^2-2x+3$ by (x+2) using synthetic division.

We will divide the coefficients 4 -2 3 by -2

First term = 4 will remain same.

Second term = $(-2 \times 4) -2 = -8-2 = -10$

So, second term = -10

Third term = $(-2 \times -10)+3 = 23$

So, third term = 23

So, 4 -10 23 is the correct answer

So, Option 2 is the correct answer.

5 0

3 years ago