Solve the simultaneous equations
5y−4x=8
y+x=7

x= ?
y= ?

Answers

Answer 1

Answer:

x=3 y=4

Step-by-step explanation:

5(4)=20

4(3)= 12

20-12=8

4+3=7

Answer 2
Y=4
X=3
5(4)-4(3)=8
4+3=7

Related Questions


2 (4 + g)(-11) = 121

Answers

Answer:
= −19/2


Step-by-step-explanation:

2(4+)(−11)=121
2(+4)(−11)=121

Helppp me please its overdue I’ll give out brainliest please don’t answer if you don’t know

Answers

Answer:

#7-$50.40 #8-$12,952.50 #9-$44.11 #10-$90.61

Step-by-step explanation:

#7- 18 ÷100= .18 .18(280) = $50.40

#8- you already have

#9- 5.53÷100 = .0553 .0553(462.82)= $44.11

#10- you already have

Write an equation of the line passing through the points (3,5) and (-1. - 15).

Answers

Answer:

y = 5x - 10

Step-by-step explanation:

Answer:

y=20/4x-10

Step-by-step explanation:

(3, 5) (-1, -15)

-15-5/-1-3=20/4x

y=-10



Consider the figure.
19 in.
9 in.
8 in.
Enter the volume, in cubic inches, of the right rectangular prism

Answers

Answer:

1368 inches ^3

Step-by-step explanation:

What is 11d - 88. In algebraic expressions

Answers

Simplifying
11d + -88 = 0

Reorder the terms:
-88 + 11d = 0

Solving
-88 + 11d = 0

Solving for variable 'd'.

Move all terms containing d to the left, all other terms to the right.

Add '88' to each side of the equation.
-88 + 88 + 11d = 0 + 88

Combine like terms: -88 + 88 = 0
0 + 11d = 0 + 88
11d = 0 + 88

Combine like terms: 0 + 88 = 88
11d = 88

Divide each side by '11'.
d = 8

Simplifying
d = 8

-
Mark me as brainlist if it’s okay :)

Simplify the expression 2.6 - 3.2n - 2n + 5.

Answers

Answer:

7.6-5.2n

Step-by-step explanation:

combine like terms so -3.2n-2n = -5.2n

2.6+5=7.6

7.6-5.2n

Answer:

-5.2n + 7.6

Explanation:

2.6 - 3.2n - 2n + 5

Add Similar Elements-3.2n - 2n = -5.2n

= 2.6 - 5.2n + 5

Add2.6 + 5 = 7.6

= -5.2n + 7.6

- PNW

Please help I’ll make you brainlist PLZZ

Answers

Answer:

1,-3

Step-by-step explanation:

Answer:

-3/1

Step-by-step explanation:

take the two points

(-2,10) and (-1,7)

plug it in into y2-y1/x2-x1

and you get -3/1

z=
Please help!!!!!!!

Answers

Answer:

37

Step-by-step explanation: sorry if wrong just trying to help

A triangle has side lengths of (3a – 7),
(a + 14), and (2a + 1). What simplified
expression represents the perimeter of the
triangle?

Answers

Answer:

6a+8

Step-by-step explanation:

To find the perimeter of a shape add all the sides up

To do this just add everything together

this means we have

3a-7+a+14+2a+1

Add like terms and get

6a+8

**EXTRA POINTS**

Find the coordinates of the image of J(8,7) after a reflection over the x-axis.

Answers

Answer:

(8, -7)

Explanation:

If you are reflecting over the x-axis the x will stay the same, but the y will change into a negative.

Please help. 20 points! and brainliest!

Answers

Answer:

Step-by-step explanation:

$2,850+10%=6,086$

please help i’ll give brainliest

Answers

Answer:

about 463 minutes or 7.7 hours

Step-by-step explanation:

area=length*width

4.75ft*3.25ft=15.4375ft^2

Now multiply 15.4375*30 to get 463.125 minutes

Need Help ASAP. Scale factor: 3:1
6 in
a
15 in
Scale drawing
Object
O A. Side a is 12 inches long and side bis 3 inches long.
B. Side a is 45 inches long and side bis 18 inches long.
Ο Ο Ο Ο
O C. Side ais 12 inches long and side bis 4 inches long.
D. Side a is 5 inches long and side bis 2 inches long.

Answers

D is more likely the answer, hope it helped
D hdjhndhdjhdmdhdjdndhndhmdhdj

If two pairs of corresponding sides are ________ and the included angles are ______, then the triangles are similar.

Answers

Answer:

congruent and similar

Step-by-step explanation:

Maybe not sure

Please help due ASAP
Show workings

Answers

Answer:

WZ = 30

Step-by-step explanation:

set up equation based on WZ = W'Z'

3/4[6x + 10] = 13x - 35

multiply each side of equation by 4 to eliminate fractions:

18x + 30 = 52x - 140

-34x = -170

x = 5

substitute 5 for 'x' in either expression:

13(5) - 35

65 - 35 = 30

Answer:

[tex] \frac{3}{4} (6x + 10) = 13x - 35 \\ [/tex]

Just find the value x

4(x -2) + 1 = 16x – 7

ik its alot to solve but if someone would tell me what type of equation this is and i need the step by step on how to solve it QUICKK

Answers

Answer:

iurecusnsdjdsks

Step-by-step explanation:

xjbdhs zxj  xzjnxnj xjkaszklaslkx

The quitient of w and 10 is equal to 7

Answers

Answer: It's prolly 70

Step-by-step explanation:

70/10=7

It’s 70 because 10x7= 70


Find the area of the
regular figure below:

A) 466 mm2
B) 430 mm2
C) 404 mm2
D) 495 mm2
E) 512 mm2

explain pls

Answers

Answer:

Option A

Step-by-step explanation:

Central angle of the pentagon = [tex]\frac{360}{\text{Number of sides of the regular polygon}}[/tex]

                                                   = [tex]\frac{360}{5}[/tex]

                                                   = 72°

Measure of ∠BAC = 72°

Therefore, measure of ∠BAD = [tex]\frac{72}{2}[/tex]

                                                 = 36°

By sine rule in ΔABD,

sin(36°) = [tex]\frac{\text{Opposite side}}{\text{Hypotenuse}}[/tex]

            = [tex]\frac{BD}{AB}[/tex]

            = [tex]\frac{BD}{14}[/tex]

BD = 14(sin36°)

     = 8.23 mm

Similarly, by cosine rule,

cos(36°) = [tex]\frac{\text{Adjacent side}}{\text{Hypotenuse}}[/tex]

              = [tex]\frac{AD}{AB}[/tex]

              = [tex]\frac{AD}{14}[/tex]

AD = 14(cos36°)

     = 11.33 mm

Area of ΔABC = 2(Area of ΔABD)

                        = [tex]2(\frac{1}{2}(\text{Base})(\text{Height})[/tex]

                        = AD × BD

                        = 11.33 × 8.23

                        = 93.21 mm²

Since, area of regular pentagon given in the picture = 5(area of ΔABC)

= 5(93.21)

= 466 mm²

Therefore, Option A will be the answer.

Which of the equations below have one solution? Select all that apply. 8x–3x+5=5x–2 9=3(5x–2) 6x–(3x+8)=16 9x+4–x=4(2x+1)

Answers

Answer:

The equations that have one solution are 9=3(5x–2) and 6x–(3x+8)=16

Step-by-step explanation:

To determine which equations have one solution, we will determine the solution(s) to all the equations (that is, find the value of the unknown, x).

1. 8x–3x+5=5x–2

This becomes

5x+5=5x-2

Subtract 5x from both sides

5x-5x+5 = 5x-5x-2

0+5 = 0-2

This equation has no solution

2. 9=3(5x–2)

First, open the bracket by distributing 3

∴ 9 = 15x - 6

Then, add 6 to both sides

9+6 = 15x -6 +6

15 = 15x

Divide both sides by 15

15/15 = 15x/15

1 = x

∴ x = 1

This has one solution.

3. 6x–(3x+8)=16

Open the bracket by distributing –1

6x -3x -8 = 16

3x - 8 = 16

Add 8 to both sides

3x -8 +8 = 16 + 8

3x = 24

Divide both sides by 3

3x/3 = 24/3

x = 8

This has one solution.

4. 9x+4–x=4(2x+1)

This becomes

9x -x +4 = 4(2x+1)

Then, 8x +4 = 4(2x+1)

Open the bracket by distributing 4

8x +4 = 8x +4

This is true for any value of x.

Hence, the equations that have one solution are 9=3(5x–2) and 6x–(3x+8)=16.

Savannah is planning to buy enough raffle
tickets to have a 10% chance to win the raffle.
If there are 200 raffle tickets being sold, how
many raffle tickets does Savannah need to buy

Answers

Answer:

Step-by-step explanation:

X/200 x10/100 = 20

hey please help me with this

Answers

Answer:

The Answer is A(6+3x=30)

Step-by-step explanation:

Because there is one 6, and 3 x's then you simplify the problem to be:

6+3x=30

ANSWER: 6+3x=30 (Answer A)

Answer:

B) 3(X+6)=30

Step-by-step explanation:

The correct equation should be 6+3x=30

B is 3X+18=30

The other equations are the same

c) 3x=30-6 (the next step to solving the equation

d) 30=3x+6 (symmetric property)


PLEASE HELP THIS IS FOR MY MATH!!!

Answers

Answer:

92

Step-by-step explanation:

1,374 ÷ 15 = 91.6

you can't have .6 of a box so you add an extra one to make 92

92 boxes will be needed to hold all the souvenir paperweights.....

Can I please have help me with this problem ​

Answers

9514 1404 393

Answer:

  B, C

Step-by-step explanation:

Shelby's total earnings will be the sum of the amount she has earned and the amount she can earn working h hours. That latter amount is 25h, since she makes $25 per hour. She wants that total to be at least $2000.

  75 + 25h ≥ 2000

Dividing by 25 gives ...

  3 +h ≥ 80

subtracting 3, we have ...

  h ≥ 77

These match options B and C of your list.

Find the value of 5^-3 x 2^-1

Answers

Answer:

1/250

Step-by-step explanation:

5^-3 × 2^-1

5^-3 = 1/5^3 = 1/125

2^-1 = 1/2^1 = 1/2

so 5^-3 × 2^-1 means 1/125 × 1/2

= 1/125 × 1/2

= 1/250

What is the measure of

Answers

Answer:

x=50°

Step-by-step explanation:

52°+78°+x°=180°(by angle sum property)

130°+x°=180°

x°=180°-130°

x°=50°

Answer:

ur answer would be x=50

Step-by-step explanation:

hope this helps

right on edge 2021

The area of circular garden is 706.5 feet2. What is the circumference of the garden? (Use 3.14 for pi .)

Answers

Answer:

30[tex]\pi[/tex] or 94.2 feet

Step-by-step explanation:

Use the area formula to find the radius:

A = [tex]\pi[/tex]r²

706.5 = 3.14r²

225 = r²

15 = r

Then, find the circumference using the formula:

C = 2[tex]\pi[/tex]r

C = 2[tex]\pi[/tex](15)

C = 30[tex]\pi[/tex]

So, the circumference of the garden is 30[tex]\pi[/tex] or approximately 94.2 feet


Can somebody help me with this question. Will mark brainliest.

Answers

Answer:

The answer is the third option! :)

Step-by-step explanation:

Hope you do great:)

I NEED HELP PLZZZ!!! I AM AN IDIOT!

What is the value of x?


Enter your answer in the box.

x =

Answers

Answer:

x = 4

Step-by-step explanation:

Using the sine ratio in right Δ JKL and exact value

sin30° = [tex]\frac{1}{2}[/tex] , then

sin30° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{JL}{KL}[/tex] = [tex]\frac{JL}{8\sqrt{2} }[/tex] = [tex]\frac{1}{2}[/tex] ( cross- multiply )

2JL = 8[tex]\sqrt{2}[/tex] ( divide both sides by 2 )

JL = 4[tex]\sqrt{2}[/tex]

---------------------------------------------------------------

Using the sine ratio in Δ JLM and exact value

sin45° = [tex]\frac{1}{\sqrt{2} }[/tex] , then

sin45° = [tex]\frac{ML}{JL}[/tex] = [tex]\frac{x}{4\sqrt{2} }[/tex] = [tex]\frac{1}{\sqrt{2} }[/tex] ( cross- multiply )

x × [tex]\sqrt{2}[/tex] = 4[tex]\sqrt{2}[/tex] ( divide both sides by [tex]\sqrt{2}[/tex] )

x = 4

Answer:

4

Step-by-step explanation:

When explaining my solution I will assume that you know SOH CAH TOA. If you don't leave a comment below and I will explain it

We know the line KL and angle K which is enough to get the rest of the lenghts of this triangle

Using CAH we have

Cos30=x/8sqrt2

solve for x and get

8sqrt2Cos30=x

Put this into your calculator and get that line KJ= 9.7979

With this we can solve for the rest of the trinagle using a^2+b^2=c^2

So we have

9.7979^2+LJ^2=(8sqrt2)^2

Compute what you can and get x by itself to get

LJ^2=32

LJ=sqrt32 which is 5.6568

Now that we know the length of line LJ we can solve the second part of the triange.

Knowing that the hypotonous is equal to 5.6568 and angle j=45 we can use SOH

we have

sin45=x/5.6568

Solve this and get

5.6568sin45=4

x=4

A puppy's weight, in y ounces, after x weeks, can be represented by y = 1.2x +2.25. Which statement is a correct interpretation of this relationship?
The puppy's weight after 1.2 weeks is 2.25 ounces.
The puppy's weight when it was born was 1.2 ounces.
The puppy's weight increases at the rate of 1.2 ounces per week.
The puppy's weight increases at the rate of 2.25 ounces per week.

Answers

Answer:

The puppy's weight increases at the rate of 1.2 ounces per week.

What’s the answer to
This linear equation3(x+4)-2=16

Answers

9514 1404 393

Answer:

  x = 2

Step-by-step explanation:

This linear equation has 1 answer. It can be found by working backward through the operations that are performed on the variable. Those are ...

4 is addedthe sum is multiplied by 3the product has 2 subtracted

We can "undo" the last of these by adding 2 to both sides of the equation.

  3(x +4) = 18

Undo the multiplication by 3 by dividing both sides by 3.

  x +4 = 6

Undo the addition of 4 by adding -4.

  x = 2 . . . . . the solution

__

Check

Put 2 in the equation where x is and see if it is true.

  3(2 +4) -2 = 16

  3(6) -2 = 16

  18 -2 = 16 . . . . . true

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