Mathematics High School

x = 2 y − 4
7 x + 5y = −66

Answers

Answer 1

Answer:

x = -8

y = -2

Step-by-step explanation:

The variable x in this system of equations is already isolated. Therefore, we can substitute it into the other equation and solve for y.

7(2y - 4) + 5y = -66

14y - 28 + 5y = -66

19y = -66 + 28

y = -2

Then we solve for x

x = 2(-2) - 4

x = -8

Related Questions

Dasher wrapped 16 of the 54 presents for Christmas.
Please represent how many presents his contribution was as a fraction and as a percent.

Answers

9/27 and 30%

Step-by-step explanation:

16/ 54 then reduced to 9/27

to find percent divide 16/54 to get 0.296 then round that to 0.30 multiple by 100 to change to percent which is also just moving decimal over 2 places so 30%

Which angle(s) are supplementary to angle BAD?

Answers

Answer:

hi

Step-by-step explanation:

how much tax would you pay on a new tv that is 899 at bed buy if the tax rate is 6.5

Answers

Answer:

The total cost would be $957.44, and the tax is $58.44.

Step-by-step explanation:

Brainliest

Answer:

58.44

Step-by-step explanation:

Write the equation of the line passing through the points (28,4) and (-4,-4).

Answers

Can you put a picture of the question plis so I can answered

Answer:

The general equation of a straight line is y = mx + c, where m is the gradient, and y = c is the value where the line cuts the y-axis. This number c is called the intercept on the y-axis. The equation of a straight line with gradient m and intercept c on the y-axis is y = mx + c.

solve it using these steps , you will get the answer

Step-by-step explanation:

Will bought 5 notebooks for $0.65 each. How much did the notebooks cost? plzz show your work​

Answers

Answer:

well obviously one notebook cost $0.65

Step-by-step explanation:

so we would multiply 0.65x5

and u get $3.25 all together

Just multiply 5 x 0.65
You would get
= $3.25

y = x + 5
2x + y = 17

Answers

Answer:

y = x + 5: x=y−5

2x + y = 17 : x=-1/2y+17/2

Step-by-step explanation:

I do not exactly know what you were asking but I just answered the questions, if that is not what you were looking for tell me so I can try and edit my answer

Help me out guys plssss<3 I’ll give u a star

Answers

Answer:

The 3rd one is the answer

Step-by-step explanation:

For it to be a function, the x values all have to be different. For the 3rd one, -3 is repeated. Therefore it is the answer.

10x- 4.5 + 3x = 12x- 1.1

x=​

Answers

Answer:

19..........................

Enter the solution (x ,y) to the system of equations shown.
y=-6
y=4x+12

Answers

Answer:

x=-4.5

Step-by-step explanation:

y= -6

y= 4x+12

-6 = 4x+12

-6 = 4x+12

-12 -12

_________

-18 = 4x

----- ------

4 4

-4.5 = x

Jeff hikes 1/2 mile every 15 minutes, or 1/4 hour. Lisa hikes 1/3 mile every 10 minutes, or 1/6 hour. How far do they each hike in 1 hour?​

Answers

Answer:

they each hike 2 miles

Step-by-step explanation:

Jeff: 15=1/2

        *4    *4

      60 min=2 miles

Lisa:  10=1/3

          *6   *6

        60 = 2

In its SIMPLIEST form, what is the Entscheidung problem? (Definition for dummies

Answers

A challenge posed by David Ackerman in 1928 The problem is an algorithm that considers, an input, a statement and answers (like yes and no) according to whether the statement is universally valid in every structure satisfying the axioms

Help!

Which of the following is an annual expense?

A)car insurance
B)electric bill
C)savings
D)rent
​

Answers

Among the given options, the annual expense would be A) car insurance

Car insurance is typically paid on an annual basis, providing coverage for potential damages or accidents involving the insured vehicle.

The policyholder pays a premium to the insurance company, which covers the cost of the insurance over the course of a year.

The other options listed, such as the electric bill (Choice B), savings (Choice C), and rent (Choice D), do involve financial transactions, but they may occur on different schedules.

The electric bill is typically a monthly or quarterly expense, while savings is a personal financial strategy involving setting aside money regularly. Rent is usually paid on a monthly basis for the use of a property.

Car insurance is the option that specifically relates to an annual expense, as it is a recurring payment made once a year for the coverage of an insured vehicle.

Correct option is A)car insurance.

For more such questions on annual expense

https://brainly.com/question/26383826

#SPJ8

HELP pls lol ill give lots of points and yeah

Answers

Answer:

(-2,-3)

Step-by-step explanation:

-2 is on the x corrdiante plane(horizontally)

-3 is the y coordinate plane(vertically)

How many tons of cheese will 20,850,000 Texans consume this year?

Answers

Answer:

60,000 tons

Step-by-step explanation:

Does anyone know this answer to the question

Answers

Answer: 40x4+25 is what you need to do Your answer is 185

Step-by-step explanation:

Answer:

$185

Step-by-step explanation:

25 for the initial fee, then 40 for each hour worked.

40 x 4 = 160

160 + 25 = 185

what is -3/2a+4(-a+3/2)​

Answers

Answer:

this is the answer

= -11/2 a +6

kskkskskskskskkzksjsjs

What is the area of a circle with a diameter of 33? Will make brainliest!

Answers

Answer: A≈855.3

Step-by-step explanation: A=1 4πd2=1 4·π·332≈855.2986

Help please answer question 1 and 2

Answers

Answer:

here..

Step-by-step explanation:

1. LM, MN. and HF in that order.

1 pt2. L, G, N in that order

2. WX, XY, UV, VS in that order

and 2 pt2. W, X, U, V in that order

Bob says that when he multiplies (x+3) (x-3) he gets x^2-6x-9 is he correct explain

Answers

(x+3)(x-3)
x*x=x^2
x*-3=-3x
3*x=3x
3*-3=-9

where’s where he most likely messed up
x^2-3x+3x-9

the correct answer is x^-9

Question 8 (5 points)
(02.07 MC)
In the figure shown, what is the measure of angle x? (5 points)

150 degrees
110 degrees
105 degrees
100 degrees

Answers

Given:

Consider the below figure attached with this question.

To find:

The value of x.

Solution:

According to the exterior angle theorem, the exterior angle of a triangle is equal to the sum of two opposite interior angles.

In triangle ABC, using exterior angle theorem, we get

[tex]\angle ACD=\angle ABC+\angle BAC[/tex]

[tex]x=75^\circ +30^\circ [/tex]

[tex]x=105^\circ [/tex]

The value of x is 105 degrees.

Therefore, the correct option is C.

( PLEASE ANSWER FOR 100 POINTS AND, BRAINLIEST ) (If you just put random letters just to get points, I'll delete your comment and report you.) (Please ANSWER!)

1.) Decide whether circumference or area would be needed to calculate it. Explain why!!! You do not need to solve it just state if it is circumference or area and why! The total number of equally-sized tiles on a circular floor.

2.) Decide whether circumference or area would be needed to calculate it. Explain why!!! You do not need to solve it just state if it is circumference or area and why! The amount of oil it takes to cover the bottom of a frying pan.

3.) Decide whether circumference or area would be needed to calculate it. Explain why!!! You do not need to solve it just state if it is circumference or area and why! The distance your car will go with one turn of the wheel.

Answers

Answer:

1. area, 2. area, 3. circumference

I'm not 100% sure but I think that's it

i suck at this math stuff please help

Answers

Answer:

Its the second one

Step-by-step explanation:

second option shows exponential growth

There are 4 circles and 8 squares. What is the simplest ratio of circles to squares?

Answers

4:8 the equivalent of 4 circles and 8 squares and you obviously want the most simplest answer so you would divide each number by the first number which make 2:4 (2 circle : 4 squares).

Again, this ain’t the simplest answer so you divide it again but this time you divide it by 2 which makes 1:2 or (1 circle : 2 squares).

Translate this phrase into a mathematic expression: “A number less than 7”

Answers

Answer:

7 - ?

Step-by-step explanation:

Write and expression like and you should have a right answer. Hope this helps and good luck :)

Answer:

x<7

Step-by-step explanation:

Hope this helps.

please simplify

5×3−8÷2×3

Answers

Answer:

Use PEMDAS

Step-by-step explanation:

answer is 7/6 i think

i am not 100% sure

The answer would be 3! You can find this using PEMDAs, aka order of operations. Hope this helps!!

LAST QUESTION AND HURRY IM BEING TIMED Last year, the enrollment at Highland Middle School was 800 students. This year, the enrollment dropped to 700 students due to the opening of a new middle school. Which best reflects the percent change in enrollment at Highland Middle School from last year to this year?

Answers

The number of students has dropped by 12.5% gllll

Answer:

-12.5

Step-by-step explanation:


2. A line has a slope of 5

Answers

Answer:

Step-by-step explanation:

Confused ‍♀️??

Answer:

I need more information

Step-by-step explanation:

A line has a slope of 5

whats the question??????????

Will give brainliest!!!!!! Please help!!!!!!!

The numbers 4,64, 22, 7, 34, and 9 are written on pieces of paper and placed in a bag. A piece of paper is chosen randomly out of the bag. How likely is it that the number on the paper will be an even number? A. impossible B. unlikely C. likely D. certain​

Answers

Answer:

Likely

Step-by-step explanation:

There are only 2 odd numbers so you’re more likely to get an even number than an odd one.

PLEASE look at the photo of my computer to see the problem

Answers

Answer:

the answer is 2+2i√3

Step-by-step explanation:

hope this helps

Answer:

2 + 2i[tex]\sqrt{3}[/tex]

Step-by-step explanation:

note that [tex]\sqrt{-1}[/tex] = i

Given

[tex]\sqrt{4}[/tex] + [tex]\sqrt{-12}[/tex]

= 2 + [tex]\sqrt{4(3)(-1)}[/tex]

= 2 + ([tex]\sqrt{4}[/tex] × [tex]\sqrt{3}[/tex] × [tex]\sqrt{-1}[/tex] )

= 2 + 2i[tex]\sqrt{3}[/tex]

Can somebody help please

Answers

What is the question?

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