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3 years ago

8

Emily estimated that there were 315 students at a soccer game the actual number of students at the game with 350 what was the pe

rcent error of her estimate

2 answers:

Elan Coil [88]3 years ago

8 0

For this case we have that the equation to determine the percentage of error is given by:

$E = \frac {| estimated - current |} {current} * 100$

Therefore, replacing values we have:

$E = \frac {| 315 - 350 |} {350} * 100\\E = \frac {35} {350} * 100\\E = 10$

Answer:

the percent error of his estimate was:

$E = 10$ %

Dmitriy789 [7]3 years ago

7 0

How much was she wrong by over the total students. then divide to make the denomentator 100 and the (new) numerator is your answer

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The percentage 21 is of 28 is equal to the percentage 30 is of 40<br> True?<br> or false?

katovenus [111]

Answer:

False

Step-by-step explanation:

75%

21

28 5.88

21 x 28

100

= 5.88

x 100% = 75%33.3333333333%

28 - 21

21

x 100% = 33.3333333333%

5 0

3 years ago

An organic farm has been growing an heirloom variety of summer squash. A sample of the weights of 40 summer squash revealed that

natta225 [31]

Answer:

b. 0.0228

Step-by-step explanation:

We are given that

n=40

Mean, $\mu=402.7 g$

Standard deviation, $\sigma=8.8$ g

We have to find the probability hat the mean weight for a sample of 40 summer squash exceeds 405.5 grams.

$P(x>405.5)=P(\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}>\frac{405.5-402.7}{\frac{8.8}{\sqrt{40}}})$

$P(x>405.5)=P(Z>\frac{2.8}{\frac{8.8}{\sqrt{40}}})$

$P(x>405.5)=P(Z>2.01)$

$P(x>405.5)=1-P(Z\leq 2.01)$

$P(x>405.5)=1-0.977784$

$P(x>405.5)=0.022216$

Hence, option b is correct.

5 0

2 years ago

PLEASE HELP FAST 100 EASY POINTS WILL MARK BRAINLEST!!!

spin [16.1K]

Answer:

$y=-1x+8 \\or\\y=-x+8$

Step-by-step explanation:

Okay so we know that line on the triangle DEF that's parallel to the line BC is EF. This because they have the same slope and we can prove that while solving for slope-intercept form.

First we figure out our points for both the lines:

BC: $B=(-2,4) \\C=(1,1)$

EF: $E=(4,4)\\F=(6,2)$

Now that we have our points we can use the slope formula to prove these two line have the same slope and are therefore parallel to eachother:

$\frac{y_1-y_2}{x_1-x_2}$ = Slope Formula

BC = $\frac{4-1}{-2-1} =\frac{3}{-3} =\frac{-3}{3} =-1$

EF = $\frac{4-2}{4-6} =\frac{2}{-2}=\frac{-2}{2}= -1$

So now we proved that both of these lines have a slope of -1. Then we can use the slope intercept formula and one of the points from the line EF to find the y-intercept of the of line EF:

Let's use point = $(4,4)$

$y=4,m=-1,x=4,b=?$

$y=mx+b\\4=-1(4)+b\\4=-4+b\\(+4) 4=-4+b(+4)\\8=b$

We used the formula and found that the y-intercept was $(0,8)$ , so now we plug in all of our answers:

$y=-1x+8$

This is the complete answer but if you wanted to simplify it more you could write it as $y=-x+8$ , cause as long as you make the x negative in the equation it will always be as if you multiplied it by -1.

7 0

2 years ago

Help me with this question please!

BlackZzzverrR [31]

$\large \rm \frac{2 ^{3} }{ \sqrt[4]{2} }$

$\large \rm \frac{2 ^{3} }{2 ^{ \frac{1}{4} } }$

Divide the terms with the same base by subtracting their exponents

$\large \rm \: 2 ^{3 - \frac{1}{4} }$

Calculate the difference

$\large \rm2 ^{ \frac{11}{4} }$

7 0

2 years ago

A system of equations is graphed below.<br> Which point represents the solution to this system?

Sergeu [11.5K]

$\huge \bf༆ Answer ༄$

The solution of the system of equation is the coordinates of the common point on both lines !

that is ~

$\sf( - 3,2)$

Therefore the Correct choice is C

8 0

3 years ago