I don’t understand this so can anyone help with this!?

Answer:

a. y=x-2     b. -2

Step-by-step explanation:

a.) if the slope is 1, the x-int is always the negative of the y-int so y=x-2

b.) in y=mb+b (slope intercept form) b is the y-int so -2

Brainliest Plz??

Answer:

3

Step-by-step explanation:

Answer:

x=3

Step-by-step explanation:

Secant-Secant Formula:(whole secant) x (external part) =

       (whole secant) x (external part)

4 *(9) = x *(12)

36  =12x

Divide each side by 12

36/12 = 12x/12

3 =x

Answer:

[tex]f(7) = 49[/tex]

Step-by-step explanation:

Given

[tex]f(x) = \left[\begin{array}{cc}3x+5&1.5 <x < 2\\x^2&x>2\end{array}[/tex]

Required

Determine f(7)

To do this, we make use of

[tex]f(x) = x^2[/tex]

Because [tex]7 > 2[/tex]

So, we have:

[tex]f(x) = x^2[/tex]

This becomes:

[tex]f(7) = 7^2\\[/tex]

[tex]f(7) = 49[/tex]

Answer:

the first two are true and the last two are false

Answer:

  D.  7°C

Step-by-step explanation:

The difference between two numbers is the distance between them on the number line.

  4 -(-3) = 4 +3 = 7

Temperatures -3°C and +4°C are 7°C apart. The difference between the temperatures is 7°C.

_____

Additional comment

Often, in math, when we talk about the difference between A and B, we mean specifically the value (A-B). In plain English, when we talk about the difference between A and B, we mean the positive difference--the value obtained by subtracting the smaller number from the larger one.

Here, the difference between New York and London temperatures would ordinarily be interpreted in math to be -3 -4 = -7°C. That is not an answer choice, so we must assume the positive difference, 7°C, is intended.

Answer:

Your answer is 2.

Answer:

C. 9.87

Step-by-step explanation:

I calculated it logically

210 - 30 = 180

180 ÷ 15 = 12

12 weeks

It would take her 12 weeks to pay for the DVD player.

the answer of this equation is 6

Answer:

£6.00

Step-by-step explanation:

15/100×40

=£6.00

Answer:

1/6

Step-by-step explanation:

Answer:

8.4%

Step-by-step explanation:

let x = interest rate

55,000(1 + x)^16 = 200,000

divide both sides by 55,000

(1 + x)^16 = 3.636

find the invese of 16

1 + x = 1.084

x = 0.084

x = 8.4

Answer:

38

Step-by-step explanation:

To find the median, make sure the number are in increasing order (they are), then start crossing out the outside numbers until you meet in the middle:

32 36 38 39 42

/ 36 38 39 /

/ / 38 / /

The only number left is 38, so the median is 38.

If there were two numbers remaining, you would take the average of the two.

    (Add both numbers and divide by 2)

Answer:

105.4º

Step-by-step explanation:

supplementary angles total 180º

180 - 74.6 = 105.4º

Answer:

I think it is b) 70

Step-by-step explanation:

Arrange the numbers in ascending order then find the middle number.

Answer:

70

Step-by-step explanation:

Write down all the data points: 20, 40, 50, 70, 80, 90, 110 and identify which is in the very middle.

Answer: 3

7x + 15 = 41 or 7x - 15 = 41

Answer:

7x - 15 = 41

Step-by-step explanation:

The key word is "difference" so keep that in mind. 7 times a number and 15 is 41. The "number" is unknown so a variable can be put in place until the number is known. The whole equation equals 41. The word "and" is where the "difference" or subtraction sign should go. Now we have a translated description! I hope this helps and if I'm wrong, please let me know!

Answer:

66.48% of full-term babies are between 19 and 21 inches long at birth

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean length of 20.5 inches and a standard deviation of 0.90 inches.

This means that [tex]\mu = 20.5, \sigma = 0.9[/tex]

What percentage of full-term babies are between 19 and 21 inches long at birth?

The proportion is the p-value of Z when X = 21 subtracted by the p-value of Z when X = 19. Then

X = 21

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{21 - 20.5}{0.9}[/tex]

[tex]Z = 0.56[/tex]

[tex]Z = 0.56[/tex] has a p-value of 0.7123

X = 19

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{19 - 20.5}{0.9}[/tex]

[tex]Z = -1.67[/tex]

[tex]Z = -1.67[/tex] has a p-value of 0.0475

0.7123 - 0.0475 = 0.6648

0.6648*100% = 66.48%

66.48% of full-term babies are between 19 and 21 inches long at birth

Answer:

50

Step-by-step explanation:

50???

Answer:

sin49° = 0.75471

sin 49° = 0.75471

sin 49 degrees = 0.75471

Step-by-step explanation:

Answer:

Step-by-step explanation:

8 is not a function

9 is a function

10 is a function

Answer:

because either x-6=0 or x+1=0

x-6=0

x=0+6

x=6     OR,

x+1=0

x=0-1

x=-1

Step-by-step explanation:

Answer:

area of semicircle=76.969 inches

triangle is=10 in so 20 since there is 2 triangles made

rectangle=140 in

236.969 inches is the total

hope this helps

have a good day :)

Step-by-step explanation:

the answer is 26

brainliest?

Answer:

The answer is 100 :D

Step-by-step explanation:

1: You would start by finding the sum of the two angles given (72 and 8) which is 80

2: You would then subtract the sum from 180

3: 180-80 = 100

Hope this helps :D

Answer:

$19

Step-by-step explanation:

$61-$25=$36-$17=$19

Answer:

0.0713 = 7.13% probability that the result is positive.

Step-by-step explanation:

Probability of a positive test:

91% of 1/650(has the disease).

7% of 1 - 1/650 = 649/650(does not have the disease). So

[tex]p = 0.91\frac{1}{650} + 0.07\frac{649}{650} = \frac{0.91 + 0.07*649}{650} = 0.0713[/tex]

0.0713 = 7.13% probability that the result is positive.

Answer:

I believe it's 17 :)

Step-by-step explanation:

5×3= 15 +2 = 17

Answer: mean is 13.5 and median is 7

Step-by-step explanation:

to get median you do (7+7)/2 and get 7 and for the mean you just add all of the numbers and divide by how many numbers there are. Basically it is 81/6 to get 13.5

Answer:

Median = 7

Mean = 13.5

Step-by-step explanation:

To find the median, put them in increasing order:

3, 5, 7, 7, 23, 36

cross out the values on the ends until you meet in the middle:

/, 5, 7, 7, 23, /

/, /, 7, 7, /, /

Find the average of the two middle numbers: (7+7)/2 = 7

Median = 7

For the mean, add all numbers and divide by the amount of numbers you have:

3 + 5 + 7 + 7 + 23 + 36 / 6

=81/6

= 13.5

Answer:

$132

Step-by-step explanation:

$440-440×0.70

=$132