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3 years ago

Please help me I’m stuck on this! first best answer gets brainliest

Mathematics

1 answer:

klio [65]3 years ago

6 0

Answer:

we are told there are 8 letters, and each letter between A-H is 8 total unique letter
So 8! is going to be the outcome.

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Boxes of sticky fingers Popsicles are $4.50 the supermarket is offering 30% off coupon what is the price with coupon

BARSIC [14]

I believe the price for one box with the coupon will be $3.15. This is because 4.50 * .30 = 1.35
4.50 - 1.35 = 3.15 Thus the discounted price will be $3.15

4 0

3 years ago

Read 2 more answers

V/5 - 2 = -6 find the value of v

Elan Coil [88]

v = -20

you may replace v with -20 and simplify to vertiy the answer.

3 0

4 years ago

Read 2 more answers

I need the answer to all of them if somebody could give me the answer it would be nice to all of thme

kogti [31]

The third one is r=-10 (don't forget the negative!)
The fourth one is p=-3 (again, watch for the negative)
((I can't get the fifth one, sorry. You might want to repost another question with just that one))
The sixth one is w=35.

Hope this helped a little bit! Sorry I couldn't help with all of them .-. Good luck though!

3 0

3 years ago

What is a scale factor?

Blababa [14]

Answer:

Here is some helpful information from my mini lessons.

Step-by-step explanation:

If two objects have the same shape, they are called "similar." When two figures are similar, the ratios of the lengths of their corresponding sides are equal. To determine if the triangles shown are similar, compare their corresponding sides. Here you'll learn that the ratio of the perimeters of similar figures is equal to their scale factor and that the ratio of their areas is equal to the square of their scale factor. If two polygons are similar, then the ratio of the lengths of any two corresponding sides is called the scale factor. This means that the ratio of all parts of a polygon is the same as the ratio of the sides.

3 0

3 years ago

Taking a test i don’t know anything about please help

PilotLPTM [1.2K]

Answer:

See below for answers and explanations

Step-by-step explanation:

Problem 4:

The line of regression is $\hat y = a+bx$ where:

$a=\overline y-b \overline x$

$b=\frac{r*s_y}{s_x}$

We are given that $\overline y=75$ , $s_y=8$ , $\overline x=280$ , $s_x=30$ , and $r=0.60$ , therefore our slope, $b$ , is:

$b=\frac{r*s_y}{s_x}$

$b=\frac{(0.60)(8)}{30}$

$b=0.16$

Therefore, the slope of the regression line is 0.16, which can be used along with the values of $\overline y$ and $\overline x$ to find the constant $a$ :

$a=\overline y-b \overline x$

$a=75-(0.16)(280)$

$a=30.2$

This means our final regression line is $\hat y = 30.2 + 0.16x$

Problem 5:

The slope, $b=0.16$ , means that for every 1 point earned for a student's pre-exam total, their final exam score will increase by 0.16 points for each point they earned on the pre-exam.

Problem 6:

The y-intercept (or constant), $a=30.2$ , means that if a student's pre-exam total were 0, then they would expect to get a 30.2 on the final exam.

Problem 7:

$R^{2}=(0.60)^{2}=0.36=36\%$

Problem 8:

The fraction of variability (aka. coefficient of determination), $R^2$ , means that a certain proportion (or percentage) of the variance in the response variable can be explained by the explanatory variable. In context, this means that 36% of the variance in final exam scores can be explained by the pre-exam scores.

6 0

3 years ago