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3 years ago

13

I NEED HELP ! I’m doing a math quiz right now and I’m confused

1 answer:

Goshia [24]3 years ago

8 0

Step-by-step explanation:

one of his student shoot a ball from his hand at an initial height of 2 m with an initial upward velocity of 10 meters per second , the height of the ball can be modeled by the ģuadratic eģuation wath answer the ģuation -4.9t2+10t+2 after t seconds

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Use the function to answer the question.

katrin2010 [14]

Put 6 into f(x). 2(6)-8 = 4
Put that 4 into g(x)
4-5 =-1

-1

8 0

3 years ago

Leema's test scores in chemistry are 80, 95, 88, 92, and 100. Find the mean and standard deviation of the data. If necessary, ro

Softa [21]

Answer:

Mean is 91

SD=6.8 to the nearest tenth.

Step-by-step explanation:

Leema's test scores in chemistry are 80, 95, 88, 92, and 100.

We want to find the mean and standard deviation.

The mean is given by:

$\bar X=\frac{80+95+88+92+100`}{5}$

$\bar X=\frac{455`}{5}=91$

The standard deviation is given by:

$SD=\sqrt{\frac{\sum(x-\bar X)^2}{n} }$

$SD=\sqrt{\frac{(80-91)^2+(95-91)^2+(88-91)^2+(92-91)^2+(100-91)^2}{5} }$

$SD=\sqrt{\frac{1140}{25} }$

SD=6.8 to the nearest tenth.

8 0

3 years ago

What is 4,000,000+3000+50+2 in standard form

zalisa [80]

4,003,052....Hope this helped

7 0

3 years ago

Read 2 more answers

Find the following <br> (u•w)(2)=<br> (w•u)(2)=

Stells [14]

Step-by-step explanation:

substitute 2 into x

1. (u ○ w)(2)

u(w(x))

= 4(-5x+1)+2

= 4(-5.2+1)+2

= 4(-9)+2

=-34

2. (w ○ u)(2)

w(u(x))

= -5(4x+2)+1

= -5(4.2+2)+1

= -5(10)+1

= -49

8 0

3 years ago

Find three rational numbers between 1 and 0.

Alex73 [517]

Answer:

1/2, 1/4 & 3/4

Step-by-step explanation:

mean of 0 &1 is $\frac{0+1}{2} =\frac{1}{2} \\$

mean of 0 and 1/2 is $(0+\frac{1}{2} )/2=\frac{1}{2} /2=\frac{1}{2} *\frac{1}{2} =\frac{1}{4}$

mean of 1/2 and 1 is $(\frac{1}{2} +1)/2=\frac{3}{2} /2=\frac{3}{2} *\frac{1}{2} =\frac{3}{4}$

So the three rational numbers are 1/2, 1/4 & 3/4

4 0

3 years ago