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4 years ago

6

If g(x)=x² – 5x + 3, find g(-2).

1 answer:

Serggg [28]4 years ago

7 0

Answer:

17

Step-by-step explanation:

g(-2) = -2^2 -5(-2)+3 = 17

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Which number is a multiple of 4?<br> A. 26<br> B. 32<br> C. 14<br> D. 22

ivolga24 [154]

Answer:

B) 32

Step-by-step explanation:

8 x 4 = 32

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3 years ago

Find the area of the regular polygon with the given radius or apothem. Why is the area?

Svetradugi [14.3K]

Answer:56.52

Step-by-step explanation:2x3.14=6.28

6.28x3=18.84

18.84x3=56.52

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3 years ago

A Biycle wheel has a diameter of 52cm.

schepotkina [342]

Answer:

26cm

Step-by-step explanation:

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3 years ago

A time for the 100 meter sprint of 14.9 seconds at a school where the mean time for the 100 meter sprint is 17.6 seconds and the

kirza4 [7]

Answer:

Z-score = -1.285

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 17.6 seconds

Standard Deviation, σ = 2.1 seconds

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

For x = 14.9, we have:

$z_{score} = \displaystyle\frac{14.9-17.6}{2.1} = -1.285$

A z-score to be unusual if its z-score is less than -2.00 or greater than 2.00.

Thus, the z-score is not unusual as it lies in the range [-2.00, 2.00]

6 0

3 years ago

2x-5y=9<br> 3x+4y=2<br> solve the simultaneous equations

wariber [46]

$\huge\boxed{x=2;\ y=-1}$

$\left\{{{2x-5y=9}\atop{3x+4y=2}}\right$

First, we will solve the second equation for $x$ . Subtract $4y$ from both sides of the second equation.

$3x=2-4y$

Divide both sides of the second equation by $3$ .

$x=\frac{2}{3}-\frac{4}{3}y$

$\left\{{{2x-5y=9}\atop{x=\frac{2}{3}-\frac{4}{3}y}}\right$

Substitute the value of $x$ from the second equation into the first.

$\left\{{{2(\frac{2}{3}-\frac{4}{3}y)-5y=9}\atop{x=\frac{2}{3}-\frac{4}{3}y}}\right$

$2(\frac{2}{3}-\frac{4}{3}y)-5y=9$

We will solve the first equation for $y$ .

Distribute the $2$ to the $(\frac{2}{3}-\frac{4}{3}y)$ .

$\frac{4}{3}-\frac{8}{3}y-5y=9$

Combine the like terms.

$\frac{4}{3}-\frac{23}{3}y=9$

Add $\frac{4}{3}$ on both sides.

$-\frac{23}{3}y=9-\frac{4}{3}$

$-\frac{23}{3}y=\frac{23}{3}$

Divide both sides by $\frac{23}{3}$ .

$-y=1$

Multiply both sides by $-1$ .

$y=\boxed{-1}$

Substitute the value of $y$ into the second equation.

$\left\{{{y=-1}\atop{x=\frac{2}{3}-\frac{4}{3}y}}\right$

$x=\frac{2}{3}-\frac{4}{3}*-1$

Multiply.

$x=\frac{2}{3}+\frac{4}{3}$

Add.

$x=\frac{6}{3}$

$x=\boxed{2}$

5 0

3 years ago

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