2x+7y=4 −2x−8y =−2 ​

Answer: x=50

Step-by-step explanation:

Use the distributive property to multiply -0.2 by x-20.

-0.2x+4=44-x

Add x to both sides.

-0.2x+4+x=44

Combine -0.2x and x to get 0.8x.

0.8x+4=44

Subtract 4 from both sides.

0.8x=44-4

Subtract 4 from 44 to get 40.

0.8x=40

Divide both sides by 0.8.

x=40/0.8

Expand 40/0.8 approx 50 by multiplying both numerator and the denominator by 10.

X=400/8

Divide 400 by 8 to get 50.

x=50

Answer:

it would be EC (B)

Step-by-step explanation:

I think the answer is b sorry if its whrong and good luck!

Answer:

offFfffff ^^3

Step-by-step explanation:

TYSMMMMM!!!!!!!;-;

Answer:

y = 2x-3

Step-by-step explanation:

Twice the age means 2x

three less means -3

2x -3 = y

y = 2x -3

Brainliest appreciated!

Answer:

Yes!

Step-by-step explanation:

If not people won't understand the concept of the problem you are working on. Hope this helps please reward me brainlist!!!

Answer:

it depends with what you are doing or using them for

It depends with what you are doing with them

Answer:

2 1/2 cups of flour

Step-by-step explanation:

Priya is making 3 loaves of bread, so she will use 7 1/2 cups of flour.

Andre is making 1 loaf of bread, which is 1/3 the amount of loaves Priya is making. So, he will be using 1/3 the amount of flour Priya is using. So all we have to do is take 7 1/2 and divide it by 3:

7.5/3 = 2.5

Andre will use 2 1/2 cups of flour.

Answer:

A

Step-by-step explanation:

Any rational expression where the denominator is zero is undefined.

The only expression where the denominator is zero is A [tex]\frac{7}{0}[/tex]

Answer:

4x_2x=_5_1

2x=_6

2x/2=_6/2

X=_3

Answer:

x = - 3

Step-by-step explanation:

Given

4x + 1 = 2x - 5 ( subtract 2x from both sides )

2x + 1 = - 5 ( subtract 1 from both sides )

2x = - 6 ( divide both sides by 2 )

x = - 3

Answer:

PLEASE MARK AS BRAINLIEST

Z = 130

Y = 50

X = 130

Step-by-step explanation:

hope this helped

Answer:

Step-by-step explanation:

Correct option is C

Answer:

87

Step-by-step explanation:

Answer:

1.3??

Step-by-step explanation:

Answer:

130%

Step-by-step explanation:

Let x be the unknown number.

of the unknown number = [tex]\frac{13}{10}[/tex] [tex]x^{}[/tex]= 1.3x

We need to find the [tex]\frac{13}{10}[/tex] of a number is what percent of that number.

%=[tex]\frac{new value}{Inital Value}[/tex] x 100

Substitute 1.3x for new value and x for initial value in the above formula.

%=[tex]\frac{1.3x}{x}[/tex]x 100

Cancel out the common factors.

%= 1.3 x 100

%= 130

Therefore, [tex]\frac{13}{10}[/tex] of a number is 130% of that number.

Answer:

y= 1/2x + -3

Step-by-step explanation:

it starts at -3, and climbs by 1/2 points every time. (remember, 1/2 can be read as rise/run. Rise one, run 2)

Answer:

see explanation

Step-by-step explanation:

The area (A) of a rectangle is calculated as

A = width × length

let width be w then length is 2w + 3 ( 3 more than twice the width ), then

A = w(2w + 3) ← distribute

   = 2w² + 3w

When w = 4 , then

A = 2(4)² + 3(4)

   = 2(16) + 12

    = 32 + 12

     = 44 ft²

The value of g(-4) is 1. The correct option is C

A function that has a different sub-function for different intervals of the domain is called  Piece-Wise Function

The functions for the different interval is

g(x)= [tex]\rm \sqrt[3]{x+5}[/tex] , x ≤ -4

     = -x² +11 , x > -4

The value of g(-4) will be determined by using g(x)= [tex]\rm \sqrt[3]{x+5}[/tex]

Substituting the value x = -4

g(x) = [tex]\rm \sqrt[3]{-4+5}[/tex]

g(x) = ∛1

g(x) = 1

Therefore, The value of g(-4) is 1. The correct option is C

To know more about piece-wise function

https://brainly.com/question/27973487

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Answer:

x

Step-by-step explanation:

[tex] \frac{2}{ x3} \times \frac{3}{2} \\ \frac{1}{3} \times 3 \\ \frac{1}{ x3 } \times 3 \\ {x}^{1} \\ x[/tex]

Answer:

What we have to find?

.....

Answer:

The solutions to the system of equations are:

[tex]y=-8,\:x=-4[/tex]

Thus, option C is true because the point satisfies BOTH equations.

Step-by-step explanation:

Given the system of the equations

[tex]\begin{bmatrix}y=x-4\\ y=3x+4\end{bmatrix}[/tex]

Arrange equation variables for elimination

[tex]\begin{bmatrix}y-x=-4\\ y-3x=4\end{bmatrix}[/tex]

[tex]y-3x=4[/tex]

[tex]-[/tex]

[tex]\underline{y-x=-4}[/tex]

[tex]-2x=8[/tex]

[tex]\begin{bmatrix}y-x=-4\\ -2x=8\end{bmatrix}[/tex]

solve for x

[tex]-2x=8[/tex]

Divide both sides by -2

[tex]\frac{-2x}{-2}=\frac{8}{-2}[/tex]

[tex]x=-4[/tex]

[tex]\mathrm{For\:}y-x=-4\mathrm{\:plug\:in\:}x=-4[/tex]

[tex]y-\left(-4\right)=-4[/tex]

[tex]y+4=-4[/tex]

[tex]y=-8[/tex]

The solutions to the system of equations are:

[tex]y=-8,\:x=-4[/tex]

Thus, option C is true because the point satisfies BOTH equations.

Answer:

80 and 9 in that order.

Step-by-step explanation:

Answer:

it's the first option

Step-by-step explanation:

Answer:

ITS SPANISH ENGLSIH PLEZ

Step-by-step explanation:

Answer:

A 62°

B 118°

C 62°

D 118°

E 50°

F 58°

G 120°

H 120°

I 120°

J 60°

K 60°

L 60°

M 120°

N 120°

O

P 60°

Q 35.5°

R 49°

S 35.5°

T 109°

U 71°

V 109°

W 60°

The value of her investment at the end of 7 years is $11804

The given parameters are

Principal, P = $5000

Rate, r = 4.5%

Time, t = 7 years

The value is then calculated as:

Value = P * P(1 + r)^t

So, we have:

Value = 5000 + 5000 * (1 + 4.5%)^7

Evaluate the expression

Value = 11804

Hence, the value of her investment at the end of 7 years is $11804

Read more about compound interest at:

https://brainly.com/question/24924853

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Answer:

120

Step-by-step explanation:

First, you have to calculate the money that Seth would spent if he goes to 30 movies if his father gets the summer movie pass by adding up the cost of the pass plus the result of multiplying the cost per movie with the pass for the number of movies:

30+(3*30)=30+90=120

Second, you need to calculate the money that Seth would spent if he goes to 30 movies without the pass by multiplying the normal price per movie for the number of movies:

8*30=240

Third, you need to find the difference between both costs:

240-120=120

According to this, the answer is that if Seth plans to go to 30 movies this summer, he would save 120.

Answer:

c

Step-by-step explanation:

becuase 20+60 is 80

Answer: Its D

Step-by-step explanation:

negative is down and left positive is up and right

Answer:

(0, -5)

Step-by-step explanation:

The answer is in the equation you gave for the line. In the formula for the equation of a line, y = mx + b, b is the y-intercept, and since because the y-intercept is shown in a graph in the form of (0,b), the answer is (0, -5).

Answer:

81.859%

Step-by-step explanation:

We solve the question using z score formula

z = (x-μ)/σ, where

x is the raw score

μ is the population mean = 80 mph

σ is the population standard deviation = 7 mph

For x = 66 mph

z = 66 - 80/7

z = -2

Probability value from Z-Table:

P(x = 66) = 0.02275

For x = 87 mph

z = 87 - 80/7

z = 1

Probabilith value from Z-Table:

P(x = 87) = 0.84134

The probability of the trials will give the DeLorean a speed between 66 mph and 87 mph is calculated as:

P(x = 87 mph) - P(x = 66 mph)

0.84134 - 0.02275

= 0.81859

The percentage of the trials will give the DeLorean a speed between 66 mph and 87 mph?

100 × 0.81859

81.859%

Answer:

Step-by-step explanation:

Given m=-3/5 ; c = -2

y =mx + c

y= (-3/5)x -2

Reflection. A reflection is what appears to be the same distance from the other side of the mirror.

Answer:

[tex]\sf 5x-y=5 \\ \sf 2y-x=11 [/tex]

[tex]\sf 5x-y=5\dots\dots(1)[/tex]

[tex]\sf -x+2y=11 \dots\dots (2)[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf 10x-2y=5\dots\dots(3)[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf -x+2y=11\dots\dots (4)[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf 4x=16 [/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf x={\dfrac {16}{4}}[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf x=4 [/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf -4+2y=11[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf 2y=11+4 [/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf 2y=15 [/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf y={\dfrac {15}{2}}[/tex]

[tex]\therefore[/tex][tex]\sf (x,y)=(4,{\dfrac {5}{2}})[/tex]

Answer:

(3, 10 ) and (7, 30 )

Step-by-step explanation:

Given the 2 equations

5x - y = 5 → (1)

2y - x² = 11 → (2)

Rearrange (1) expressing y in terms of x

y = 5x - 5 → (3)

Substitute y = 5x - 5 into (2)

2(5x - 5) - x² = 11

10x - 10 - x² = 11 ← rearrange into standard form

x² - 10x + 21 = 0 ← in standard form

(x - 3)(x - 7) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 3 = 0 ⇒ x = 3

x - 7 = 0 ⇒ x = 7

Substitute these values into (3) for corresponding values of y

x = 3 → y = 5(3) - 5 = 15 - 5 = 10 ⇒ (3, 10 )

x = 7 → y = 5(7) - 5 = 35 - 5 = 30 ⇒ (7, 30 )