Mathematics High School

Solve by elimination.
X + y = -1
x-y=-7

Answers

Answer 1

Answer:

(x,y) = (-4,3)

Step-by-step explanation:

Answer 2

Answer:

X=-4, y=3

Step-by-step explanation:

Solve By Elimination.X + Y = -1x-y=-7

Related Questions

The graph of a function f is shown below. Find f(-1).

Answers

Isn’t it 1 / 1 ?or something like that is positive for sure

Colin invests £1100 into his bank account.
He receives 5% per year simple interest.
How much will Colin have after 3 years?
Give your answer to the nearest penny where appropriate.

£

Answers

Answer:

Colin will have $1,265 after three years.

Step-by-step explanation:

First, we find the amount of interest Colin will have by using the following formula,

simple interest = principal * interest rate * time

now that we know the formula, we substitute the numbers in.

simple interest = $1,100 * 5% * 3

since the interest rate is obviously a percentage, we have to convert it into a decimal.

simple interest = $1,100 * 0.05 * 3

now that it is a decimal, we can solve this expression.

simple interest = $1,100 * 0.05 * 3

simple interest = $55 * 3 (here, we did $1,100 * 0.05 first so that it doesn't get confusing with all the numbers, it will be easier with two final numbers)

simple interest = $165

Colin has $165 simple interest but over here asks how much she will have AFTER 3 years. think about it, can you have $165 after having $1,100 in your bank AFTER 3 years? no, so we need to add the interest by the principal by using the following formula,

total amount = principal + simple interest

now, we substitute the numbers in.

total amount = principal + simple interest

total amount = $1,100 + $165

total amount = $1,265  

Therefore, Colin will have $1,265 after 3 years.

HELP I NEED HELP ASAP

Answers

Answer:A??

Step-by-step explanation:

HELP ASAP IM GIVING 40 POINTS I NEED THE AREA FROM THIS TRAPEZOID MODEL IN PICTURE

Answers

Answer:

multiply its height by its width or  use this: Area of a trapezoid is found with the formula, A=(a+b)/2 x h. aka base plus base times the height

Step-by-step explanation:

f(x) = –x^2 – 4x
Find f(-1)

Answers

Answer:

3

Step-by-step explanation:

Evaluate F(x) = –x^2 – 4x by substituting -1 for x:

              F(-1) = –(-1)^2 – 4(-1)

This becomes:

               F(x) = –1 + 4  =  3

Kevin has a packet of 25 grams of sugar. How many milligrams of sugar does he have? A. 25,000 mg B. 27,500 mg C. 30,000 mg D. 50,000 mg

Answers

Answer:

25000 mg.

Step-by-step explanation:

There are 1000 mg per gram.  If we multiply 1000*25 we will get 25000 mg of sugar.

idek the answer please help

Answers

Answer:

A.

Step-by-step explanation:

y⁵ ÷ y⁹

= y⁵-⁹

= y-⁴ [ 3rd answer ]

Can y’all guys give me a list websites to wach anime on that are not bloked by the school cause please thank u

Answers

Answer:

it depends on what your school district restricts

Step-by-step explanation:

Independent Practice


Simplify the expression. 6 7 −4 7


A.
2 72 square root of 7


B.
2


C.
− 10 7


D.
10 710 square root of 7

Answers

Answer:

A.

2 72 square root of 7

Step-by-step explanation:

Combine the fractions by finding a common denominator.

Exact Form:

2

7

Decimal Form:

0.

¯¯¯¯¯¯¯¯¯¯¯¯

285714

Simplify the expression.

Exact Form:

2

√

7

Decimal Form:

5.29150262

…

Which statement describes the end behavior of the function f(x) = 8|x − 1| + 13?

A.
As x approaches negative infinity, f(x) approaches negative infinity.
B.
As x approaches negative infinity, f(x) approaches positive infinity.
C.
As x approaches positive infinity, f(x) approaches negative infinity.
D.
As x approaches positive infinity, f(x) is no longer continuous.

Answers

The statement that describes the end behavior of the function f(x) = 8|x − 1| + 13 is:

As x approaches positive infinity, f(x) approaches negative infinity.C.

Let's analyze the function.

The function f(x) = 8|x − 1| + 13 involves the absolute value of x − 1, which means that the expression inside the absolute value will always be non-negative.

x approaches positive infinity, the value of x − 1 also approaches positive infinity.

Since the absolute value of a positive number is equal to the number itself, we can simplify the expression to f(x) = 8(x − 1) + 13.

As x approaches positive infinity, the term 8(x − 1) becomes larger and larger, making f(x) approach negative infinity.

The constant term 13 does not have a significant impact on the end behavior as x becomes increasingly large.

For similar questions on function

https://brainly.com/question/25638609

#SPJ8

plsssssssss help I really need to do this I will give brainliest to anyone who solves

Answers

Answer:

MSP: 6a/2

CUB: ab/2

ABC: 20 square centimeters

KDR: 5x cm * 3x cm / 2

Step-by-step explanation:

MSP: 6 x a divided by 2

CUB: a x b divided by 2

ABC: 8 x 5 divided by 2

KDR: 5xcm * 3xcm divided by 2

Enter the slope of the line through the points (-9, -6) and (3, -9)

Answers

Answer:

-1/4 slope

Step-by-step explanation:

y2 -y1 = -9 - (-6) = -3

x2-x1= 3 -9 = 12

-3/12 = - 1/4

If your answer is right ill give brainliest!!!

Answers

Answer:

I don't know I am a babysitter too :)

Guided Practice


The equation s = p – 0.15p represents the sale price s of an item with an original price p, after a 15% discount. A T-shirt costs $12. What is the sale price?



A.
$142.20



B.
$11.85



C.
$13.80



D.
$10.20



THE ANSWER IS NOT: B.
$11.85

Substitute for p and solve for s.

s==p−0.15p12−0.15(12)

Answers

It’s d because 12-15%=10.20

what is 30 = –5d – 5

Answers

Answer:

-7

Step-by-step explanation:

30=-5d-5

-5d=30+5

-5d=35

d=35/-5

d=-7

please help me this is for a grade

Answers

Answer:

A, B, and D are congruent

Step-by-step explanation:

Answers a b d are all congruent

Someone please help with this

Answers

Answer:

A

Step-by-step explanation:

I said so

Answer:

C. They are similar triangles.

Step-by-step explanation:

they have the same angle measures, but not the same side lengths. so they are similar but not congruent.

Help me please !!!!!!!!

Answers

Step-by-step explanation:

[tex] \tan(45) = \frac{x}{13} \\ 1 = \frac{x}{13} \\ x = 13[/tex]

[tex] \cos(45) = \frac{13}{y} \\ 2 \sqrt{2} = \frac{13}{y} \\ 2y \sqrt{2} = 13 \\ y = \frac{13}{2 \sqrt{2} } [/tex]

Beth pays for her phone each month based on the number of hours that she uses. Each month she pays $12 for her phone and $2.50 per hour she is using it. What is the total charge for a month in which Beth used the Internet for 90 hours?

Answers

Answer:

$237

Step-by-step explanation:

(# of hrs x $ per hr = total $ for all hrs)

90(hrs) x 2.5($ per hr) = 225(total $ fro all hrs)

(total $ for all hrs + initial payment per month = anwer)

225(total $ fro all hrs) + 12(initial payment per month) = 237(answer)

PLEASE HELP IM BEING TIMED HURRY

A pack of 5 of board games costs $75.
If there is a direct proportion between the price (y) and number of board games (2), which equation represents the
situation?
A
y = 2
y = 15.2
y = 52
y = 75.00

Answers

C. y = 5x is your answer.

Answer:

C. y=5x

Step-by-step explanation:

I'm pretty sure that it's y=5x, because it says that y represents the price, and that 2 represents that amount of board games. The price is $75, and the number of board games is 5. So the answer should be y=5x.

PLEASE HELP QUICKLY I WILL MARK YOU BRAINLIEST.

Mr. Rector and Ms. Mitchell are grading papers. Mr. Rector can grade 24 papers in 10 minutes. Ms. Mitchell can grade 30 papers in 8 minutes. How many more papers per minute can Ms. Mitchell grade?

Answers

Answer: 1.35

Step-by-step explanation:

Answer:

1.35

Step-by-step explanation:

We need to identify our independent variables and dependent variables.

The number of papers graded depend on the amount of time.

The amount of time is the independent variable

The papers graded depends us the dependent variable

Divide the independent variable by the dependent variable to find papers per minute

For Ms.Mitchell the papers per minute is

For Mr.Rector, the papers per minute is

Subtract 2.4 from 3.75.

The answer is 1.35

Is b = 5 a solution to the inequality below?
b<1
yes
no

Answers

Answer:

No

Step-by-step explanation:

The given inequality is b < 1.  We determine whether or not b = 5 is a solution by substituting 5 for b and asking ourselves whether the resultant inequality is true or not:

5 < 1 is FALSE and so b = 5 is NOT a solution of the given inequality.

Which expression is equivalent to 4m + 3?
A. 2(2m + 3)
B. -2(-2m + 3)
C. (-2)m - (-1)3 + (-2)2m
D. (-2)m - (-3)1 + (2)3m

Answers

Answer:

D)

Step-by-step explanation:

4m+3

1) how many 1/4's are in 2/3?
2) how many 5/12's are in 1/2?​

Answers

Answer:

1) how many 1/4's are in 2/3 = 8/3

2) how many 5/12's are in 1/2?=6/5

Step-by-step explanation:

After 3 hours of steady snowfall, Rhianna measures how much snow is in her driveway. She finds there is 1/2 of an inch of snow. How many inches of snow fell each hour?

Answers

Answer:

1/6 inch per hour

Step-by-step explanation:

1/2 ÷3= 1/6

I thought I had $35 in my bank account.
When I checked my balance, I actually
had $75. Aaayyyyeeee!!! What was my
percent error?

Answers

your awnser will be 100 because if

Mr.Eastman drew triangle JKL,with a height of 12 inches and a base of 12 inches, and triangle XLZ, with a height of 8 inches and a base of 16 inches.Which trangle has the greater area?

Answers

Answer:

Step-by-step explanation:

Area of triangle = 1/2 × Base × Height

Mr.Eastman drew triangle JKL,with a height of 12 inches and a base of 12 inches

Area of JKL = 1/2 × 12 inches × 12 inches

= 72 Square inches

triangle XLZ, with a height of 8 inches and a base of 16 inches. Which triangle has the greater area?

The following tape diagram describes the relationship between the amount of red paint and the amount of blue paint in a "Plummy Purple" paint mix. How many cans of blue paint would need to be mixed with 12 cans of red paint to make "Plummy Purple"?

Answers

Answer:

9

Step-by-step explanation:

5•7^2y=175
Which of the following is the solution of the equation?

Answers

Answer:

D seems to be the answer

Step-by-step explanation:

log7(35) =2

Answer:

C

Step-by-step explanation:

y=log7(35)/2

khan academy

Solve for x.
Simplify your answer as much possible

Answers

The answer is 9

You divide by -2 on both sides leaving you with X=9
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