Please help with these math questions

Answers

Answer 1

Answer: 1. Slope intercept form is y=mx+b, where m is slope and b is y-intercept.
It gave you point (8,12) and slope of -2.
So you already know the value of m, so so far it's y = -2x + b.
Plug the coordinates as x and y: 8 for x and 12 for y.
12 = -2(8) + b
12 = -16 + b
28 = b

Adding b in, you get y = -2x + 28

2. Find the slope, then use point-slope form.
Slope is change in y over change in x, or (y2-y1)/(x2-x1).
m = (9-1)/(2-3) = 8/(-1) = -8

Point slope form: y - y1 = m(x - x1)
y - y1 = -8(x - x1)
Now plug in either of the coordinates as x1 and y1, let's do (3,1).
y - 1 = -8(x - 3)
y - 1 = -8x + 24
y = -8x + 25

3. Do it the same way as number 2. Choose two points, for example (1,1) and (2,-2). You find m = -3 and get final answer as y=-3x + 4.

4. B = 150 + 80d
B is account balance, d is number of monthly deposits.
If you rearrange the terms: B = 80d + 150, you see that that is in slope-intercept form y = mx+b, and if you remember from #1 m is the slope. In this case, the variables are changed, so d is the slope here. And the question told you that d, the slope, is the number of monthly deposits. Its coefficient is 80, so Bianca deposits $80/month.

5.
14a + 16b = 560
16b = 560 - 14a
b = (560 - 14a)/16
b = 560/16 - 14a/16
b = 35 - (7/8)a
b = -(7/8)a + 35

Related Questions

Factor completelyx^2 (5x-14)
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After a gas-filled balloon is released, it rises 90 feet by the end of the first minute. By the end of the second minute, the balloon rises 120 feet, and by the end of the third minute, it rises 150 feet. How many feet would the balloon rise in 8 minutes?
I need help with this, i'm giving brainliest to the first person that answers everything!
Cindy has printed 45 pages. Each page has 18 stickers. she will cut apart the tickets on each page . How may tickets will Cindy have in all.

The history of rental fees for a two bedroom apartment are recorded in the graph below create a linear function that models the data on the graph let X =0 represents the year 1980Pick one of the below
Y= -25X +500
Y=25x+500
Y=500x+25
Y=-500x+25

Answers

Y=25x+500 that’s the answer

Consider parallelogram ABCD with side CB extended through point E

Answers

Answer:

m<CAB = 50

Step-by-step explanation:

m<ABE = 120

Angles ABE and BAD are alternate interior angles of parallel lines, so they are congruent.

m<BAD = 120

m<CAB + CAD = m<BAD

m<CAB + 70 = 120

m<CAB = 50

Sara reduced the time it takes her to run a mile from 8 minutes to 6 minuets. what was Sara's percent decrease in the time it takes her to run a mile

Answers

Answer:

Saras percent should be 2% If Im wrong please correct me :)

What are five fractions between -8/10 and -4/5

Answers

There are no fractions between -8/10 and -4/5.

What is Fraction?

A fraction represents a part of a whole.

We need to find five fractions between -8/10 and -4/5.

When we simplify -8/10 we get -4/5

The fractions -8/10 and -4/5 both are same fractions

So there are no fractions between -8/10 and -4/5

Minus eight by ten is equal to the minus four by five.

So, the fraction itself does not have any fractions in between.

Hence there are no fractions between -8/10 and -4/5.

To learn more on Fractions click:

brainly.com/question/10354322

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their are no fractions between those because they are the same number

Compare the values of underlined digits. 6300 and 530

Answers

The value of 3 in 6300 is 10 times the value of 3 in 530.
This is because 530 is in the tens place and 6300 is in the hundreds place.

Just look at the two numbers carefully and see which ones are the same

7. The probability that Jane smokes is 4/9. The probabilitythat she smokes and develops lung cancer is 3/10.
Find the probability that she develops lung cancer, given
she smokes.

Answers

To find the probability that she develops lung cancer given that she smokes, multiply the two probabilities together:

4/9 x 3/10 = (4 * 3) / (9*10) = 12/90 = 2/15