7 - 2x - 5y=-7
3x + 4y = 7

Answers

Answer 1
-7 + 7 = 0
-5y = 2x
-5y/5 = y
2x/5 = 2x/5

y = 2x/5

4y = -3x + 7

4y/4 = y

-3x/4 + 7/4

y = -3x/4 + 7/4


Related Questions

Please answer this correctly without making mistakes

Answers

Answer:

1 mi 1927 ft

Step-by-step explanation:

Turn everything into feet:

5mi x 5280 ft/1 mi  = 26,400ft + 1,348 ft = 27, 748 ft

3mi x 5280 ft/1 mi = 15,840ft + 4,701 ft = 20,541 ft

Do the subtration that the problem wants you to do:

27, 748 ft - 20,541 ft = 7,207 ft

Turn the answer into mi & ft:

7,207 ft - 5280 ft = 1927 ft

=

1 mi 1927 ft

A 16-foot ladder must reach 13 feet up a building. What's the measure of the angle

that the ladder makes with the ground?

OA) 39.090

OB) 3.6°

C) 54.34°

D) 35.66°

Answers

The answer is c.
Do you wanna build a snowman or ride our bikes around the halls.

The correct answer is C) 54.34°.

1. A school store sells pencils and erasers before school opens each day. On Monday, 13 pencils and

10 erasers were sold for $16.75. On Tuesday, 25 pencils and 2 erasen were sold for $19.85. What

is the price of a pencil? What is the price of an eraser.

Answers

Answer:

price of pencil is 0.74 and eraser is 0.72$

Step-by-step explanation:

Let, "p" represent pencils

and "e" represents erasers.

hence, according to question

13p+10e=16.75 ________(1)

and 25p+2e=19.85________(2)

Multiplying equation (2) by 5,

hence, 125p+10e=99.25________(3)

Substracting equation (3) and (1)

125p+10e-(13p+10e)=99.25-16.75

hence, 112p=82.5

p=0.74

substituting the value in equation (1),

13(0.74)+10e=16.75

9.57+10e=16.75

on solving,

e=0.72

hence, price of one pencil is 0.75$, and price of one eraser is $0.72

P varies directly as q. When q=31.2,p=20.8. Find p when q=15.3.

Answers

Answer:

a)   p = 10.20

Step-by-step explanation:

Step(i):-

Given that   p varies directly as q

               p ∝ q

       ⇒    p = k q

where 'K' is proportionally constant

given p =20.8 and q = 31.2

            p = k q

       ⇒ 20.8 = k (31.2)

           [tex]k = \frac{20.8}{31.2}[/tex]

          k = 0.666

Step(ii):-

   p = k q

Given that  q = 15.3 and k = 0.666

  p = 0.666 ×15.3 = 10.20

 

The Martin family's truck gets an average of 24 miles per gallon. Predict how many miles they can drive using 5 gallons of gas.

Answers

Answer:

120 miles

Step-by-step explanation:

just take 24*5 to get how many miles they can travel which would be 120 miles

What is the area of this figure?


28 yd²

40 yd²

52 yd²

64 yd²

Answers

Answer:  A= s^2 <- for a square

A= 1/2*b*h <- for a triangle

A= 4^2= 16

A= 1/2*8*6 (The whole height is 8 yd)

A= 1/2*48

A= 24

24+16= 40 yd^2

"B" is the answer.

I hope this helps!

Step-by-step explanation: A= s^2 <- for a square

A= 1/2*b*h <- for a triangle

A= 4^2= 16

A= 1/2*8*6 (The whole height is 8 yd)

A= 1/2*48

A= 24

24+16= 40 yd^2

"B" is the answer.

I hope this helps!

Answer:

40 yd²

Step-by-step explanation:

took test :)

Help!!

A class rolled number cubes. Their results are shown in the table.
What is the experimental probability of rolling a number less than 5?



67.8%

49.5%

34.4%

84.7%

Answers

Answer:

A. 67.8%

Step-by-step explanation:

the total number of occurences are 202

Now the total number of occurencess for 4 and below are 137

So Heres the quickest way to do it: Divide 137 by 202 then multiply it by 100 being 100%

Then you would get 67.8, then well put the percent sign behind it.

For the equation y = - 3x + 2 2. determine the value of y when x = 2?

Answers

Y = -3(2) +22
Y = -6 +22
Y = 16

Answer:

y=16

Step-by-step explanation:

x=2

y=-3x+22

y=-3(2)+22 then y=-6+22, y=16

If 10% of a number is 36 and 55% of the same number is 198, find 45% of that number.

Answers

9514 1404 393

Answer:

  162

Step-by-step explanation:

There are many ways to work this. Perhaps the simplest is to recognize that 45% of the number is the difference between 55% of it and 10% of it.

  0.55n -0.10n = 0.45n

  198 -36 = 0.45n = 162

45% of the number is 162.

_____

If you like, you can find the number as ...

  0.10n = 36

  n = 36/0.10 = 360

Then you can verify (if you like), that 55% of it is 198:

  0.55(360) = 198 . . . . true

Finally, you can figure 45% of it:

  0.45(360) = 162

__

Using proportions, you can determine the number to be ...

  36/0.10 = n/0.45

  n = 0.45(36/0.10) = 4.5(36) = 162

The data distribution is ___

Answers

Answer:
Skewed right

Explanation:
The data is higher on the right

Answer:

skewed left

Step-by-step explanation:

I have 1 litre of water in a jug. On the way to my table I spill some. I have 780ml left. How much have I lost?​

Answers

Step-by-step explanation:

1 litre = 1000ml

780ml left

lost amount = 1000 - 780 = 220ml

If the distance from point P to point L is the same as the distance from point P to point C, then P is on

Answers

Answer:

This answer is C, it is on the perpendicular bisector of segment LC.

Draw any line segment P and L, then another point C anywhere, but the length needs to be the same as PL.  You will note that LC (if you connect those points) will become the perpendicular bisector to point P.

I hope that makes sense.....

Step-by-step explanation:

I WILL GIVE BRAINLIEST The fuel efficiency of Natalie's car is 25 miles per gallon. Which of the following statements are true? Select two that apply.

a. For every mile Natalie travels, she uses 25 gallons.
b. For every gallon Natalie uses, she travels 0.04 miles.
c. For every mile Natalie travels, she uses 0.04 gallons.
d. For every gallon Natalie uses, she travels 25 miles.

Answers

Answer:

The fuel efficiency of Natalie's car is 25 miles per gallon. Which of the following statements are true? Select two that apply.

a. For every mile Natalie travels, she uses 25 gallons.

b. For every gallon Natalie uses, she travels 0.04 miles.

c. For every mile Natalie travels, she uses 0.04 gallons.

d. For every gallon Natalie uses, she travels 25 miles.

C. and D. are the right answer.

Based on the information given about the distance, the correct options include:

c. For every mile Natalie travels, she uses 0.04 gallons.d. For every gallon Natalie uses, she travels 25 miles.

Solving the Distance

From the information, the The fuel efficiency of Natalie's car is 25 miles per gallon.

Therefore, it should be noted that for every mile Natalie travels, she uses 0.04 gallons and for every gallon Natalie uses, she travels 25 miles.

Learn more about distance on:

https://brainly.com/question/17273444

r-4.5<11
Helpppp meeee

Answers

Answer:

15.4, 15.3, 15.2...

Step-by-step explanation:

I think this is right, lemme know if it isnt and Ill try to work it out again :D

The measurements of 11 fish caught during an angling competition are recorded.
A scatter diagram is then drawn using the information.
750
One of the points is an outlier.
a) Write down its coordinates.
700
650
Weight (9)
(1)
b) What type of correlation is shown by
all the other points?
600
X
550
c) A 12th fish is caught during the session.
It has a length of 40 cm.
Estimate its weight (in g).
500
30
35
50
55
40 45
Length (cm)
Total marks: 3

Answers

Answer:

Step-by-step explanation:

A) = (35,?)

B) = POSITIVE

C) = 601

Answer:

Step-by-step explanation:

select all the expressions that all have the following quotient 2m+3

Answers

Answer:

1, 2 and 4

Step-by-step explanation:

1.32m2/16m +48m/16m =2m +3

2.4m2/2m +6m/2m =2m+3

4.10m2 /5m +15m/5m= 2m+3

Easiest way to calculate 22% mark up from a cost of say 39.99

Answers

Answer:

The markup amount on the cost 39.99 $ will be: 8.78 $

Step-by-step explanation:

Given

The cost = 39.99 (Let say in $)Mark up = 22%

As

22% = 0.22

The markup of 22% on the cost can be calculated by multiplying the cost by 22% or 0.22

so

Markup amount = 0.22 × 39.99

                           = 8.78 $

Therefore, the markup amount on the cost 39.99 $ will be: 8.78 $

Help plz will give brainliest!

Answers

Answer:

Exponential

Step-by-step explanation:

"Hunter read 40 pages in his history book in
one hour.

Rate of change is

Answers

30 seconds is 20 pages, 15 seconds is 10 pages, 7.5 seconds is 5 pages

Help me please omg. Am having trouble with this.

Answers

Answer:

Part A 225-81=144

Step-by-step explanation:

1. 15×15 =225

2. 3×3×3×3 =81

The Tanners have received an $8000 gift from one of their parents to invest in their child’s college education. they estimate that they will need $20000 in 12 years to achieve their educational goals for their child. What interest rate compounded semiannually would the Tanners need to achieve this goal?

Answers

Answer:

3.4%

Step-by-step explanation:

For given problem:

P=8000

n=2*12=24 compounding perods

A=12000

A/P=(1+i)^24

12000/8000=(1+i)^24

1.5=(1+i)^24

take log of both sides

log1.5=24log(1+i)

log1.5/24=log(1+i)

.007337=log(1+i)

10^(.007337)=1+i

1+i=1.017

i=1.017-1=.017 (interest rate per compounding period)

annual interest rate=2*.017=.034 or 3.4%

Which best describes the triangle

Answers

Answer:

scalene

Step-by-step explanation:

all sides have differing length

thank, 5 star, and brainliest if helpful!

Answer:

B

Step-by-step explanation:

A scalene triangle means all sides lengths are different and that would be the  case here.



A brand of frozen green beans lists a weight of 32

ounces on its bag. Because of variability in the

manufacturing process, the bags often contain slightly

more, or less, than 32 ounces of green beans. An

inspector takes a random sample of 25 bags of green

beans and records their weights. The weights and their

relative frequencies are summarized in the histogram

below.


Which is true about the bags of green beans in the sample?

a- twenty percent of the bags have a weight below 32.2 ounces


b- sixty percent of the bags have a weight over 32.2 ounces


c- eighty percent of the bags have a weight over 32.2 ounces


d- the interval from 32.3 to 32.4 contains the highest proportion of bags

Answers

I think the answer is B

Answer:

sixty percent of the bags have a weight over 32.2 ounces

Step-by-step explanation:

answer is B

3. Kirk wanted to open a savings account with the $2,000 he had earned over the summer. If the bank's interest rate is 5%, how much will he have in 2 year? Show your work. ​

Answers

Answer:

$200 sorry if im wrong i tried

Step-by-step explanation:

to calculate the 5 percent:  2000/100=20 20x5=100

so 100x2=200

Which statement about this graph is not true?

Answers

Answer:I n no

Step-by-step explanation:

Pls help I’ll brainlest for the right answer due today

Answers

Answer:

$51.75

Step-by-step explanation:

46 x 1.125 = 51.75

Answer:

The retail price is $51.75.

Step-by-step explanation:

If the original price is $46, and the markup is 12.5 percent, you need to:

46 dollars x 1.125 = 51.75 dollars.

Hope this helps! Please give me Brainliest if you feel this helped. Have a good day and a good rest of 2021, best of luck with your classes.

10 POINTS
8TH GRADE MIDDLE SCHOOL MATH

Answers

Answer:

first one is the answer to this

Step-by-step explanation:

Need this quick please!
Select the correct answer.
1+ 3
Which expression is equivalent to 12 - 21
-
12 + 21 - 3
I +1 if no denominator equals zero?
3
O A
o
B.
1
12 – 21 – 3
1
12 – 40 + 3
1
12 + 2.1 – 3
I + 3
1+1
OC.
OD

Answers

Answer:

C is the answer i think

Step-by-step explanation:

С
What is the solution to the equation 3x ÷ (-6) = -12?

Answers

Answer:

x=24

Step-by-step explanation:

First: Multiply -6 to both sides

Next: You get 3x=72

Then: Divide 72 by 3

Last:....

ANSWER: x=24

hi !! the answer is x= -24 :))  

What number can be a common denominator for 3/4 and 1/8

Answers

Answer:

8

Step-by-step explanation:

3/4 = 6/8

Answer:

of course

8 cause common can be like

4×2
Other Questions
In the diagram below, the radii of the two concentric circles are 3 centimeters and 7 centimeters, respectively.What is the area of the shaded region?40pi cm241pi cm28pi cm80pi cm How did the physical features of China contribute to the challenges of the Shang and Zhou dynasties? Easiest way to calculate 22% mark up from a cost of say 39.99 Solve for x in simplest form.2= 1/2 (5x-8) PLSSS HELP. And theres also at the bottom of the picture another option if u didnt see it which of these terms refers only to living organisms?biomeecosystemhabitatpopulation PLZ Help!! Answer the Question Below: I WILL GIVE BRAINLIEST The fuel efficiency of Natalie's car is 25 miles per gallon. Which of the following statements are true? Select two that apply.a. For every mile Natalie travels, she uses 25 gallons.b. For every gallon Natalie uses, she travels 0.04 miles.c. For every mile Natalie travels, she uses 0.04 gallons.d. For every gallon Natalie uses, she travels 25 miles. 11. Sally walked two-thirds of a mile for 9 days in a row. Use the model below to determine how far shewalked in 9 days? You find a Saskatoon bush growing wild that has large, sweet berries. What could you do to produce more bushes that have exactly this kind of berry? I will Give Brainliest!!! 25y Can someone help me with the answer please. BRAINLIEST IF CORRECT its easy but i think a b or d mostly b for some reason i need to see if im correctReflect the point (-12, -3) over both axes.A.(12, -3)B.(-12, 3)C.(12, 3)D.(3, 12) what are the major sources of livelihood in your community? Isabelle has $5.45 in her purse. If she has five more nickels than dimes, and twice as many quarters than dimes, how many of each type of coin does she have? A sample of water is very cloudy or shows high turbidity healthy or unhealthy? please help me please will give brainliest multiple questions please will give brainliest B,A,D,C which one?............... Which best describes the triangle Which term best completes the diagram?A. WagesB. Goods and servicesC. InterestD. Natural resources If 10% of a number is 36 and 55% of the same number is 198, find 45% of that number.