Mathematics High School

Solve the simultaneous equations.
2x + y=120
x + y=70

Answers

Answer 1

Answer:

(50, 20)

Step-by-step explanation:

y = -2x + 120

x + (-2x+120) = 70

  -x = -50

x = 50

 y = -2x+120

 y = -2(50)+120 = 20

{x,y} = {50,20}  

Related Questions

How many 2/3 are in 8/9?

Answers

Answer:

i

Step-by-step explanation:

Answer:

1 1/3

Step-by-step explanation:

(8/9) / (2/3) = (8/9) / (6/9) = 1 1/3

Aldo's scores on four tests are 88, 85, 100, and 86. What must the score be on the fifth test for her average to be 90?

Answers

aldo must score a 91 for it to average to a 90

x=5th test score

(88+85+100+86+x)/5=90

(359+x)/5=90

71.8+x/5=90

-71.8              -71.8

x/5=18.2

*5       *5

x=91

the fith test score has to be 91 in order for the average to be 90

Which is equivalent to 243 Superscript two-fifths?

3
6
9
12

Answers

Answer: Answer is 9

Step-by-step explanation:

Answer:

the answer to this question is C. 9

Step-by-step explanation:

Fractions less then 1/2

Answers

Answer:

Step-by-step explanation:

16 fractions less than one half

1/9, 2/9, 3/9, 4/9, 1/8, 2/8, 3/8, 1/7, 2/7, 3/7, 1/6, 2/6, 1/5, 2/5, 1/4, 1/3

Answer:

1/3, 1/4, 1/5, 1/6

5w-11/3=-4w
What is w

Answers

Answer:

Step-by-step explanation:

Exact Form:

w

=

11/3

Decimal Form:

w

=

3.6 (6 is repeated)

Mixed Number Form:

w

=

3 2/3

30 POINTS, MARKING BRAINLESTT!!! PLS HELP

Answers

Answer:

The first one I think joe is right, the answer to part 2 is = kx + 3x^2 − 8

Step-by-step explanation:

Find the surface area of the figure.



a
348 feet squared
b
336 feet squared
c
384 feet squared
d
624 feet squared

Answers

The answer should be B

.
G:
The 20%
discount on a
$55 sweatshirt

Answers

If there is a 20% discount on a $55 sweatshirt, that sweatshirt would now only cost $44.

Answer: $44

Also: The 20% is $11

if cos ø = -4/7 what are the values of sin ø and tan ø

Answers

Answer:

tan=5,5

sin=0,98

Sry when Its wrong

Answer:

sin• = √13/7

tan•= -√13/4

Step-by-step explanation:

sin2•+ cos2• = 1

sin• = √1-cos2•

sin•= √1-(-4/7)2

sin•= √1-16/49

sin•= √ 49-16/49

sin•= √ 13/ 49

sin•= √13/7

tan• = sin•\cos•

= √13/7/-4/7

= -√13/4

please HELP
what are the two angles called​

Answers

Answer:

The angles are supplementary.  

Step-by-step explanation:

Both angles lie on a straight line.  When two angles are right next to each other on a straight line, then they add up to 180...therefore they are supplementary.

Hope this helps!! :D

25POINTS HELP!!!!!!!!!!!

Answers

If B is 2/5 like I think it is that is the answer because the probability that someone sits in the middle row is 12/30 which is simplified to 2/5

distribute 3(-4x-3)

Answers

Answer:

-12x-9

Step-by-step explanation:

3 times -4x is -12x

3 times -3 is -9

In an equation the answer is:

-12x-9

distribute the number outside the parenthesis to the ones inside.

3 • -4x

and

3 • -3

so -12x •-9

hope this helps

need help please show your work
find the missing angles of triangl​

Answers

Step-by-step explanation:

70+60+8x+2= 180

132+8x=180

8x=48

x=6°

8x+2= 50°

FIND GE (NEED ANSWER FAST!!!)

Answers

Answer:

GE = 14

Step-by-step explanation:

3x + 5 = 6x - 4

x = 3

Plug it in.

3 (3) + 5 = 14 = GD

6 (3) - 4 = 14 = GF

With that information, you know all the blue lines are the same.

GE = 14

select the table that represents a linear function (graph and if necessary)​

Answers

Try C, not sure if that’s the answer. Graphing would help you

Answer:

A

Step-by-step explanation

Just did this.

work out the value of 7^2+4^3x2^5

Answers

Answer:

2097

Step-by-step explanation:

7² = 49

4³ = 64

2⁵ = 32

→ Substitute values

49 + 64 × 32

→ Solve

PLEASE HELP I WILL GIVE BRANLIEST TO WHO ANSWERS FIRST

Answers

56
...................................





Answer:

142

Step-by-step explanation:

you have to break the shape in to squares and find the area of each one by multiplying the sides together and then after you find the area you add all them together

Complete the following statement.

Mac mixes 14 ounces of red paint with 6 ounces of blue paint. The ratio of blue paint to total paint is
because for every 6 ounces of , there is 20 ounces of

Answers

Answer:

6:20 for the first one 6 ounces of blue paint and 20 ounces of red paint.

Step-by-step explanation:

THIS MIGHT NOT BE RIGHT IF I AM NOT RIGHT I AM SORRY

Answer:

The answer up there is correct except for the last part about red paint, the correct answer for the last on is red and blue paint, other then that it is correct.

Step-by-step explanation:

simplify -4x + 2y + z - 3x + 2y - 2z

Answers

Answer:

-7x+4y-z

Step-by-step explanation:

You will have to combine like terms.

-4x+2y+z-3x+2y-2z

-7x+2y+z+2y-2z

-7x+2y+z+2y-2z

-7x+4y+z-2z

-7x+4y+z-2z

-7x+4y-z

and the answer is:

-7x+4y-z

I hope this helps you.     :)

Answer:

-7x + 4y - z

Step-by-step explanation:

-4x + 2y + z - 3x + 2y - 2z

so combine like terms, -4x by -3x2y by 2y z by -2z=(-4x + -3x) + (2y + 2y) + (z + -2z) equals= -7x + 4y - z

I need help on this please ​

Answers

Answer:

maybe rotation.........i think....

PLEASE HELPPPP!!! MEEE! WILL GIVE BRAINIEST!!!
y =
x +

Answers

Answer:

[tex]y = 7x [/tex]

Step-by-step explanation:

To find the slope, which is

[tex] \frac{rise}{run} [/tex]

find how high up the y value goes before it intersects the x line at a specific point. It seems that they intersect at (70,10) which would be 70/10 or 7/1. 7/1 is just 7 so the slope of it is just that, 7. As for finding B, look at where the line starts, of it's above or below 0, then you would add or subtract whatever number it starts at (subtract for negative, add for positive). In this case it seems that the intercept is right at 0 so you would neither add or subtract anything. :)

I don't know how to answer this please help

Answers

Answer:

1130.4 if rounded its 1330.5

i think thats the answer :3

Step-by-step explanation:

Answer this question for 20 points.

Answers

Answer:

I believe the answer would be the option that says: "An elephant walks with a speed of 15 steps a minute. How long was the elephant walking if she walked without stopping for 480 steps?"

Answer:

C. An elephant walks with a speed of 15 steps a minute. How long was the elephant walking if she walked without stopping for 480 steps?

Step-by-step explanation:

C yields the equation of [tex]15x=480[/tex], because 15 stands for steps/minute, 480 for steps, so [tex]x[/tex] must stand for minutes.

For your entertainment:

A gives [tex]x = 480 \cdot 15[/tex].

B gives [tex]x=32-15[/tex].

D gives [tex]x=480+15[/tex].

3
4 -
8
5
1 -
8 797968686

Answers

whats the question so that we can help????

find the value of y.

Answers

Answer:

just take the 96 and 66 and middle it then take y multiply that=answer

Step-by-step explanation:

Answer: 48

Step-by-step explanation: 96/2

1) Dado o extrato bancário, marque a opção correta: *

1 ponto



a) O saldo depois do cheque nº 1 é de R$ -100,00.

b) Depois do depósito realizado de R$ 250,00 o saldo é R$ 550,00.

c) O saldo final é R$ 100,00 negativo.

d) Depois do saque de R$ 600,00 o saldo ficou positivo.

2) Dado a pirâmide abaixo, marque a opção incorreta *

1 ponto



a) A soma dos três números da linha de baixo da pirâmide é +4.

b) O número A que está faltando é +22.

c) O número B vale +4.

d) A soma entre A e B é 18.

​

Answers

A resposta correta é a letra c

An object is dropped from the top of the Statute of Liberty, which is 294 feet tall. How far is the object from the ground after 2.5 seconds if it is thrown downward from the top of the statute at an initial velocity of 65 ft./sec?
a. 11.5 feet from the ground.
b. 21.5 feet from the ground.
c. 31.5 feet from the ground.
d. 41.5 feet from the ground.

Answers

Answer:

D

Step-by-step explanation:

vlkewruiiifhklwe

Solve for y:2x+2y=6
A) y=-x+3
B) y= 2x + 6
C) y=x+3
D) y=-2x + 6

Answers

A y=-x+3 because you subtract 2x and it cancels out the divide 2y with 6 which is 3
The answer is A

2y = -2x + 6

Divide by 2 on both sides:

y = -x + 3

Write an equation of the line that passes through the given point and is parallel to the given line.
(4,7),y=5x-3​

Answers

The equation is
y
=
−
5
x
+
23

find x=, if x-12=24 now!?

Answers

Answer:

Answer is 36

Step-by-step explanation:

Trust me

Answer:

36 because 24 + 12 = 36

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