Solve the simultaneous equations

y – x = 3
y = 7x

Answers

Answer 1

Answer:

x=1/2, y=3 1/2

Step-by-step explanation:

substitute y=7x into y-x=3

7x - x = 3

6x = 3

x=1/2

y=7(1/2)

y=3 1/2


Related Questions

what do you do on this i need it asap 40 + 56 ÷ p - q

Answers

Answer:

40 + 56/p - q

Step-by-step explanation:

This equation is weird. Your answer should be 40 + 56/p - q

The only thing that would change is writing "56 ÷ p" as a fraction.

Now, here's the weird part.

If you try to solve it after rewriting "56 ÷ p" as a fraction, your answer would look like this:

40p + 56 − qp

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

         p

Unless you have a math-based keyboard that would write 40p + 56 − qp over p as a fraction formatted like the equation shown above (instead of having to put a bunch of dashes so it looks like a long fraction line), then I'd stick with just typing 40 + 56/p - q.

Which number is equivalent to 4.7

Answers

what are the answer choices


please help me guys
Which linear equation represents the data in the accompanying table? ​

Answers

Answer:

2) d = 1.50c + 20.00


1. A triangle has two angles that measure 52 degrees and 31 degrees.
What is the measurement of the third angle?

Answers

Answer:

86 degrees

Step-by-step explanation:

Interior degrees of a triangle always add up to 180 degrees

What you would do is add the first two (52+31 = 84)

Subtract this number from 180 to get your remaining degrees

86 degrees

Amir bought 3 2/3 pounds of rice.Owen bought 1 1/2 times as much as Amir.How many pounds of rice did Owen buy?

Answers

Answer:

5.49 pounds

Step-by-step explanation:

Given data

Amir bought 3 2/3 pounds of rice= 11/3 pounds= 3.66 pounds

Owen bought 1 1/2 times  or 1.5 times as much as Amir bought

Hence 1.5 time of 3.66

=1.5*3.66

=5.49 pounds in decimal

What value of w makes the equation 3(-4W - 5) = -7(5 + w) true?

Answers

Answer: W= 4

Step-by-step explanation:

The value of w will be 4.

What is substitution method?

To find the value of any one of the variables from one equation in terms of the other variable is called the substitution method.

Given that;

The expression is;

3(-4W - 5) = -7(5 + w)

Now, Solve the expression as;

3(-4W - 5) = -7(5 + w)

3 × -4w - 3 × 5 = -7 × 5 + (-7) × w

-12w - 15 = -35 - 7w

Add 12w both side;

-12w - 15 + 12w = -35 - 7w + 12w

- 15 = 5w - 35

Add 35 we get;

- 15 + 35 = 5w - 35 + 35

20 = 5w

5w = 20

Divide 5 both side;

w = 4

Thus, The value of w will be 4.

Learn more about the substitution method visit:

https://brainly.com/question/2273162

#SPJ2

how many rectangles can be made with an area of 144cm whose sides are whole numbers? PLSSS Helpp!

Answers

Don’t click on the link!!!
12 x 12
9 x 16
8 x 18
6 x 24
3 x 48
2 x 72
1 x 144
So, 7.

What is the powerhouse of the cell?

:)

Answers

Answer:

Mitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell.

Step-by-step explanation:

Answer:

Mitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cellMitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell

Step-by-step explanation:

how to calculate the difference in time between 5:44 and 11:49​

Answers

Answer:

minutes seperately and hours seperately

6:05 is the time difference

Step-by-step explanation:

Yu narukami fight me rigth now⇆⇆π⇒ωω↑ω⊇→→∧∉⇔⇒ππ∠⇄㏑∡⇄⇆→←βαβ∀∀⊅⊄ФФω≅

Answers

Answer:

jvhsucrkchnufecnigtyrnvtdcvhkbubtrddtrthgbnytdfctry

Step-by-step explanation:

Identify the coefficient (s) of the variable in the expression below.

25-6z
A:z
B:1
C:6
D:25 and 6

Answers

Answer:

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

find the area of a rectangle that has a length of 4ab^2 and a width of 6a^2b

Answers

Answer:

Step-by-step explanation:

∵A= l×b

⇒A= 4ab^2 × 6a^2b

⇒A= 24a^2b+1×b^2

Explanation: When multiplying indices, add the exponents of similar bases (that is, a^2×a = a^2+a^1 =a³) thus a^2b+1.

I hope this helped.

For all values of x, f(x) = 2x-3 and g(x) = x^2 + 1 a) Find fg(x) Simplify and give your answer in the form ax^2 + b b) Find gf(x).

Answers

Answer:

fg(x) = 2x² - 1

gf(x) = 4x²-12x +10

Step-by-step explanation:

Given the functions f(x) = 2x-3 and g(x) = x^2 + 1

a) f(g(x)) = f(x²+1)

f(x²+1) = 2(x²+1) -3

f(x²+1)= 2x²+2 -3

f(x²+1) = 2x² - 1

fg(x) = 2x² - 1

Hence function fg(x) is 2x² - 1

b) gf(x) = g(2x-3)

g(2x-3) = (2x-3)² + 1

g(2x-3) = (2x-3)(2x-3) + 1

g(2x-3) = 4x²-6x-6x+9 + 1

g(2x-3) = 4x²-12x +10

gf(x) = 4x²-12x +10

a cylinder with height 8 units has a volume of 72 cubic units. what is the radius of the cylinder?​

Answers

Answer:

r= 1.69

Step-by-step explanation:

Find the value of the angle

Answers

Answer:

the angel is called acute angel

Answer:

61 degrees

Step-by-step explanation:

sin = opposite/hypotenuse  ->  sin x = 28/32  ->  sin x = 0.875  ->  x = arcsin 0.875 = 61.04

so the angle would be 61

sorry if it's wrong

PLZ HELP!!!!!!! NO LINKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

i can't see clear

Write 10^-7 as a fraction

Answers

Answer:

-10000000/1 or 10^-7/1

Step-by-step explanation:

You can divide anything by 1 to make a fraction.

Have a nice day!

sally buys 10kg of sweets.

Answers

Answer:

150%

Step-by-step explanation:

Purchase Cost= £12 for 10kg

Sales

1 bag= 200g

200g=1 bag

1 g= 1/200 bag

10000g or 10kg= 1/200 * 10000 = 50 Bags

1 Bag = 0.60

50 Bags= 0.60*50= £30

Profit= £30- £12= 18

% Profit= 18/12 *100

=150%

What is 8 rounded to the nearest whole number HELP ASAP

Answers

Answer:

10

Step-by-step explanation:

8 is closest to 10 therefore 8 rounds up to 10

I believe it would be 4 because that is the closest number to round up because 2 x4 is 8 so it would have to be 4 but I’m sorry if I didn’t get it right!

Christine is 8 years younger than yuri. Express christine's age in terms of yuri's age

Answers

christine is “x” and yuri is “y”

y = x - 8

The present price of a motorcycle is
Rs. 2,25,000. If its price is depreciated per year by 8 %, after
how many years will be the price of the motorcycle be
Rs. 1,75,204.80 ? Find it.​

Answers

Answer:

3.25 years

Step-by-step explanation:

The computation of the number of years is shown below:

Given that

PV = $225,000

RATE = 8%

PMT = $0

FV = $175,204.80

The formula is shown below:

= NPER(RATE;PMT;PV;FV;TYPE)

After applying the above formula, the number of years would be 3.25 years

The same would be considered

What is the value of z in the equation 2(2.5z − 58 + 43) = 176− 46? (3 points)

Answers

Answer:

32

Step-by-step explanation:

2(2.5z − 58 + 43) = 176− 46

5z - 116 + 86 = 130

5z -30 = 130

5z = 160

z = 160/5

z = 32

which values are solutions to the equation below?

b^2 = 18

select all that apply

A. -√18
B. √324
C. -9
D. √18
E. 9
F. -√324

Answers

Answer:

A , D

Step-by-step explanation:

hello :

b= √18 because : (√18)² =18

b= - √18 because : (-√18)² =18

A triangle has angle measurements of 50°, 50°, and 80°. What kind of triangle is it?

Answers

Answer:

I would guess an Acute triangle

Step-by-step explanation

because all 3 sides are under 90 degrees so it cant be a right and its very close in size so its rather acute and if not its Isosceles.

Answer:

acute triangle

Step-by-step explanation:

three angles are under 90°

A(2, 4) , B(4,0) & D(-4, 0). Here, the x- and y-coordinates are measured in meters. What is the area of the plot of land?

Answers

Answer:

[tex]Area = 16[/tex]

Step-by-step explanation:

Given

[tex]A = (2,4)[/tex]

[tex]B = (4,0)[/tex]

[tex]D = (-4,0)[/tex]

Required

The area of the plot

The given coordinates show a triangle; and the area is calculated as:

[tex]Area = \frac{1}{2}|x_1y_2 - x_2y_1 + x_2y_3 - x_3y_2 + x_3y_1 - x_1y_3|[/tex]

[tex]Area = \frac{1}{2}|2*0 - 4*4 + 4*0 - -4*0 + -4*4 - 2*0|[/tex]

[tex]Area = \frac{1}{2}|-16 + 0 -16|[/tex]

[tex]Area = \frac{1}{2}|-32|[/tex]

[tex]Area = \frac{1}{2}*32[/tex]

[tex]Area = 16[/tex]

When you divide both sides of an inequality by a negative number, you need to _____ the inequality symbol.

A. flip
B. eliminate
C. raise
D. multiply

Answers

Answer:

The correct option is option;

A. Flip

Step-by-step explanation:

When both sides of an inequality is divided by a negative number, it changes the sign of both numbers while their magnitude remain the same;

Therefore, if the right hand side of the inequality is lesser than the left hand side, when the signs of the left and right hand sides of the inequality changes after a division , by a negative number, we have;

The smaller right hand side of the inequality will then have a lesser negative magnitude than the left hand side of the inequality with a higher negative value and the left hand side (with the higher negative value) becomes lesser than the right and therefore, the symbol (sign) of the inequality is flipped

Therefore, when you divide both sides of an inequality by a negative number, you need to flip the inequality symbol.

Solve for X (Geometry) Need some help ASAP

Answers

Given:

The figure of a right triangle.

To find:

The measure of x.

Solution:

According to the altitude on hypotenuse theorem, the length of the altitude is the geometric mean of segments of the hypotenuse.

Let "h" be the height  of the altitude and it divides the hypotenuse if two pieces of lengths "a" and "b", then

[tex]h=\sqrt{ab}[/tex]

In the given figure, 14 is the height  of the altitude and it divides the hypotenuse if two pieces of lengths 24 and x. So, by using the altitude on hypotenuse theorem, we get

[tex]14=\sqrt{24x}[/tex]

Taking square on both sides.

[tex]196=24x[/tex]

[tex]\dfrac{196}{24}=x[/tex]

[tex]\dfrac{49}{6}=x[/tex]

Therefore, the value of x is [tex]\dfrac{49}{6}[/tex] units and its approximate value is 8.167 units.

loelisbvueowifcqcetger

Answers

Answer:

Z= 4

Step-by-step explanation:

SOLVE FOR Z by cross multiplying

The volume of the figure

Answers

Answer:

beeep

Step-by-step explanation:

hoonk

buuurp buuuurp

Grant is making hot dogs for a picnic. Hot dogs come in packages of 8. Hot dog buns come in packages of 12. What is the least number of packages of hot dogs and packages of hot dog buns, can Grant buy so that he has the same number of servings of each?

Answers

Answer:

6 hot dog packages and 4 hot dog buns packages.

Step-by-step explanation:

12 x 4 = 48

8 x 6 = 48

Answer:

3 hot dogs and 2 buns

Step-by-step explanation:

Multiply hot dogs until you get a multiple of 12 for this the lowest common multiple is 24

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