Mathematics High School

What is the solution of the system ? Use substitution y=2x+7 y=x-1

Answers

Answer 1
(-8,-9)

Explanation:

y=2x+7 ; y=x-1

x-1=2x+7

x-1-7=2x+7-7

x-8=2x

x-x-8=2x-x

x=-8

y=x-1

y=-8-1

y=-9

Related Questions

1 picture 2 questions please help

Answers

Answer:

7)It is possible for two rectangles to have the same area but not the same perimeter 8) 8cm

Step-by-step explanation:

all expressions equivalent to 3.1y+ (y+10) + 4.2y

Answers

Answer:

8.3y + 10

Step-by-step explanation:

DE is a midsegment of AABC. Find the value of x.
A
х
D
B
E
6
-
X=
please HELP 30 points

Answers

14 i believe, if it’s a mid segment then 7 is half of x.

2 + 2 = ?
This is for easy points!

Answers

4 is the answert :))
4!!!!!!!!!!!!!!!!!!!

Guy plz Quickly
Ashley wants to know how much wrapping paper is needed to cover a box with the dimensions shown.

What is the surface area of the box?


A.
140 square inches

B.
190 square inches

C.
95 square inches

D.
175 square inches

Answers

Answer:

A. 190 inches

Step-by-step explanation:

Plug in the numbers to the surface area formula  to get 190, i messed up last time

190 I was working for like 20 min on this

Yesterday 1/8 of the books were sold at the bookstore were science fiction books.which decimal is equivalent to this fraction of books sold.

Answers

Answer:

1/8 in decimal form is 0.125

Find the X & Y value

Answers

Answer:

Step-by-step explanation:

x = 72°

y = 61°

Factor the expression.

7x+42

Answers

Answer:

7(x+6)

Step-by-step explanation:

hope it helps :)

Here is the step by step explanation:
Hope this helps
Leave a like and brainliest!

Which expressions are polynomials? Select each correct answer. x2−x√+2 2 + s 4x³ + y​

Answers

Answer:

Answers are

Y

2+s

4x^3+y

Step-by-step explanation:

Hey guys I need ur help with math.
Please help

Answers

you should type it out, i cant read that

Mel has a net annual income of $53 246 after 21% of her income is C withdrawn for tax purposes. What was her gross income?

Answers

Answer:

$67400

Step-by-step explanation:

Given that :

Net income = 53246

Deduction (tax purposes) % = 21%

Gross income = net income + deduction

Let gross income = x

x = 53246 + 21% of x

x = 53246 + 0.21x

x - 0.21x = 53246

0.79x = 53246

x = 53246 / 0.79

x = 67400

keith buys 6 pencils for 90p
how much does one pencil cost?
how much would five pencils cost
how much would eleven cost ?

Answers

15p per pencil for 6 pencils
75p for 5 pencils
1.65 for 11 pencils

Answer:

1 Pencil = 15p

5 Pencils = 75p

11 Pencils = 165p --> £1.65

Step-by-step explanation:

To find one pencil... 90 / 6 = 15

To find 5 pencils... 15 (worth 1 pencil) * 5 = 75

To find 11 pencils... 15 (worth 1 pencil) * 11 = 165 which is £1.65

what to numbers add to -7 and multiply to -12

Answers

-3 and -4 is the answer. When you add these 2 numbers they equal -7. But when you multiple them together, you get -12. I hope this helped you, if you want me to explain further, lmk.

Answer:

Not any whole numbers!

Step-by-step explanation:

What is 6x + 8y = 60 and 3x - 4y = -18

Answers

Brainly is forcing me to answer this, don’t report me sorry


will mark brainlest if correct! pls help

Answers

Answer:

See below.

Step-by-step explanation:

[tex] y_2 = 4x^2 [/tex]

[tex] x = 1 [/tex]

[tex] y_2 = 4(1)^2 = 4 = a [/tex]

a = 4

[tex] y_3 = 4^x [/tex]

[tex] x = 1 [/tex]

[tex] y_3 = 4^1 = 4 = b [/tex]

b = 4

[tex] y_1 = 4x [/tex]

[tex] x = 2 [/tex]

[tex] y_1 = 4(2) = 8 = c [/tex]

c = 8

[tex] y_3 = 4^x [/tex]

[tex] x = 2 [/tex]

[tex] y_3 = 4^2 = 16 = d [/tex]

d = 16

[tex] y_1 = 4x [/tex]

[tex] x = 3 [/tex]

[tex] y_1 = 4(3) = 12 = e [/tex]

e = 12

[tex] y_2 = 4x^2 [/tex]

[tex] x = 3 [/tex]

[tex] y_2 = 4(3)^2 = 36 = f [/tex]

f = 36

[tex] y_3 = 4^x [/tex]

[tex] x = 3 [/tex]

[tex] y_3 = 4^3 = 64 = g [/tex]

g = 64

Can you please solve this

Answers

Answer: [tex]\frac{2(x-7)}{5(x-3)(x-2)}[/tex]

Step-by-step explanation:

I'll do the fraction on the left, then the one on the right. Follow the screenshots below to help you out.

1. Use distributive property. The first of the images is me distributing all the values on the fraction on the left. Now I will do the ones on the left.

2. I used the same method. Now I will multiply the two.

3. [tex]\frac{2(x-7)}{5(x-3)(x-2)}[/tex]

Please help with number 1? It’s urgent!!!!

Answers

Answer:

b

Step-by-step explanation:

Henry drives at a speed of 80miles per hour how long will it take to drive 400miles

Answers

5 hours. hope this helps
5.5 hours
Step-by-step explanation:

Help ASAP! Use the graph to answer the question

Answers

Answer:second 1

Step-by-step explanation:

Answer:

The blue line models the data points better than the red line. It is because the data points are all close to the line.

Mean
Vasquez read 5 books in January, 8 books in February,
4books in March, and 7 books in April. What is the
average number of books Vasquez reads per month?

Answers

Answer: six per month

Answer:

6

Step By Step Solution:

[tex]5 + 8 + 4 + 7 = x\\ 13 + 4 + 7 = x \\ 17 + 7 = 24 \\ x = 24 \\ 24 \div 4 = 6[/tex]

6. The human brain weighes about 1 pounds for each 100 pounds of body weight. What
is the approximate weight of the brain of a person who weighs 85 pounds. Round to
the nearest ounce.
all

Answers

I did a proportion and I think the answer is 13.6 or 14 after being rounded

PLS PLS PLS HELP ME THIS IS LATE

Answers

Step-by-step explanation:

a + 9 = 6

p + 20 = -30

A farmer has a field in the shape of a semicircle of diameter 50 m. First,
calculate the length of the semicircle to 1 decimal place.
50 m

Answers

Answer:

157.1 m

Step-by-step explanation:

Here, we want to calculate the length of the semi-circle

This simply refers to the circumference of the semi-circle

Mathematically, the circumference is half that of a full circle

The circumference of a full circle is;

C = pi * d

For half circle or semi-circle;

It is ;

C = (pi * d)/2

D = 50 m

The circumference is thus;

C = 50 * 3.142

C = 157.1 m

hat is the slope and y-intercept of the linear function?

y = -8x + 2

Answers

Answer:

Slope: -8

y-intercept: (0,2)

Step-by-step explanation: Hope this helped! Use the slope intercept form to find the slope and y.

1. Solve the following linear equation and state the value/s of x. Round to the
nearest tenth if necessary.
2(x - 5) + 4 = 2(x-3)

Answers

Answer:

No Solution

Step-by-step explanation:

2(x - 5) = 2(x - 3)

2x -10 = 2x -6  When we subtract 2x from both sides we are left with a false statement.

-10 [tex]\neq[/tex] -6

Thus, no solution.

What are the zeros of the function h(x)=2x2+x−15
?

A
x=−3andx=−52
B
x=−3andx=52
C
x=−52andx=3
D
x=52andx=3

Answers

the correct answer is B x=-3 and x= positive 5/2

Sam put a 12-inch ruler into a cup. If 3 inches of the ruler were sticking out of the top of the cup, how deep was the cup?

Answers

Answer:

9 inches deep

Step-by-step explanation:

12 inches - 3 inches = 9 inches

Area of a square is 196 cm²

. Find the perimeter of the square. (ii) If the square is altered into a rectangle by increasing the length by x

centimeters, and decreasing the breadth by y centimeters, find the area of

the rectangle in terms of x and y.​

Answers

Step-by-step explanation:

Area of Square=side²

Side=√(Area of the square)

Given area of the square=196cm²

Side of the square=√196=14cm

Perimeter of square=4*side=4*14=56cm

Length of the rectangle=(14+x)cm

Breadth of the rectangle=(14-y)cm

Area of rectangle=Length*Breadth=

(14+x)(14-y)=14(14)+14(-y)+x(14)+x(-y)=(196-14y+14x-xy)cm²

n is less than or equal to 13

Answers

Answer:

n ≤ 13

Step-by-step explanation:

≤ is a symbol used to show less than or equal to. Since n is less than or equal to 13, you will put it like n ≤ 13.

Hopes this helps:

Answer:

Let x be the number. If x is no less than 13, the x can be greater than 13 or equal to 13. Combine these two conditions and get x >13.

If angle 2 = 117°, find angle 8

Answers

Answer:

180- 117 = 63

Step-by-step explanation:

Other Questions
"This case is as simple as black and white."How is this case literally about black and white?How is this case black and white, figuratively speaking? what expression is equvialent to -6 (-2/3 + 2x)? 3/4 of 1/3 =? please show me how to do it Trapezoid: b1 =3m; b2 = 4mA= 7m 2 What the next missing dimension? Someoneeee helpppp !!1. Determine the area of the rectangle below.Tamm15 mFormula:Plug in Values:Area: what is osmosis? Explain in detail with examples? A person with a bacterial infection begins to feel hot and feverish. This response MOST likely helps the body fight infection by How many thirds are in 12? k + 12 greater or equal than20, if k = 15 halpppppp!!!!!!!!!!__________________________________________________________________________________________________________ each side of a square is 8 by 10 metre find the area of the square What is also known as a visual aid in a presentation?A. backgroundB. animationC. reviewD. slideE. template 4. What is the Average adult coagulation time is? What conclusions have historians drawn about early civilization in the indus river valley, and why don't they know more? List 3. conflicts that Jonas faced aher he left the communities in the giver Can someone just tell me the value of w Thanks! Can someone help with this asap ? Reflect the point (2, -4) over y = x to become... a) (-4, 2) b) (-2, 4) c) (-2, -4) d) (2, 4) The approximate length (in cm) of a typical Pacific halibut t years old is given by f(t) = 200(1 -0.956e-0.181).A Pacific lialibut caught by Mike measures 140cm. What is its approximate age? the symbol between two reactants in a chemical equation?