Mathematics High School


x + 3y = 18
-X - 4y = -25

Answers

Answer 1
-y=-7
Y=7
-x-4(-7)=-25
-x+28=-25
-x=3
X=-3
Answer 2

Answer:

x = -3

y= 7

Step-by-step explanation:

x + 3y=18 ----(1)

-x - 4y=-25 -----(2)

from equation (1)

x = 18 - 3y ---(3)

putting equation (3) into equation (2)

-(18 - 3y) - 4y = -25

18 + 3y -4y = -25

3y - 4y = -25 - 18

-y = -7

y = 7 ✓

Putting y=7 into equation (1)

x + 3(7) = 18

x + 21 = 18

x = 18 - 21

x = -3 ✓

Related Questions

BRAINLIEST

Like terms of 6ab^2

1. -3ab

2. 2ab^2

3.-6a^2 b^2

4.-5ab^2

5.6ab

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Answer:

2nd option is the right answer

Given Q'R'S'T' is a dilation of QRST, find the scale factor of dilation.

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Answer:

5Cause 15 divided by 3 is five

Need this very badly​

Answers

The answer is 140 Inches because 4 times 7 is 28, 28 times 5 is 140

help me on this questioj pelase

Answers

Answer:

A

A

Step-by-step explanation:

8) because of the rules of angles we know that all angles found on a line are equal to 180 degrees, and all angles opposite one another are equal. because of this A is not possible. 90 and 40 do not add up to 180 degrees, and are not equivalent to each other.

9) using the same rules as above, we know that the two angles have to add up to 180 degrees (they can't be equal this time). A is not possible.

what is the geometric mean of 0.5 and 2

Answers

Answer:

5

Step-by-step explanation:

*
Select the expression that is equivalent to 5/8.
O
5=8
O 8-5
O 8-5
0 5-8

Answers

five over eight would be right
i dont see that here

Answer:

The right answer isnt there

Step-by-step explanation:


ﾟ+*:ꔫ:*
A. (2, 1)
B. (1, -2)
C. (1, 2)
D. (-1, 2)


♡━━━━━━━━━♡
︎thank you! ♡´･ᴗ･`♡

Answers

Answer:2,1

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Please help me!! I really need some help ASAP please

Answers

Answer:  put a dot at the place you  think 7 over 2 would be then put  one at -2 on the x axis then drawn a line

Step-by-step explanation:

Courtney got 64 out of 75 correct on a test. What is the best estimate of the percent Courtney got correct?

85%
75%
117%
64%

Answers

Answer:

A

Step-by-step explanation:

trust me

The required percentage that Cortney got correct on the test will be; 85.33%.

What is the percentage?

The percentage is the ratio of the composition of matter to the overall composition of matter multiplied by 100.

We have been given that Cortney got 64 out of 75 correct on a test.

We Need to determine the best estimate of the percentage Courtney got correct.

Here,

The Total question = 75

The correct question = 64

Then Percentage = 64 / 75 × 100

Percentage = 85.33%

Thus, the required percentage that Cortney got correct on the test will be; 85.33%.

Learn more about percentages here:

brainly.com/question/13450942

#SPJ2

7 1/2 divided by 3/4 ?
= 5
= 4
= 7
= 10

Answers

Answer:

10

Step-by-step explanation:

All of the following represent the same function except _____.


y = x - 1
{(0, 1), (2, 3), (4, 5), (7, 8)}

x y
1 0
3 2
5 4
8 7

Answers

Answer: {(0, 1), (2, 3), (4, 5), (7, 8)}

Step-by-step explanation:

For the function:  y = x - 1    (y is one less than x)

If x =1 , y= 0

if x= 3 . y= 2

If x = 5 , y= 4

If x= 8 , y= 7

So it is same as

x y

1 0

3 2

5 4

8 7

But different from {(0, 1), (2, 3), (4, 5), (7, 8)} [here x is 1 less than y]

So,  the complete statement would be : All of the following represent the same function except {(0, 1), (2, 3), (4, 5), (7, 8)} .

what is 3/7 divided by 33?

Answers

Answer:

3/231 can be simplified to 1/77.

Step-by-step explanation:

FIND THE slope given two points! pls help ill mark brain-list! (50 pts)
1. (-7-5) and (-2,7)
2. (-6,7) and (-7,8)
3. (1,1) and (4,13)
4. (-2,-6) and (-9,-6)
5. (-6,-5) and (15,2)
6. (2,1) and (4,3)
7. (2,1) and (4,-1)
8. (1,4) and (4,-2)
9. (1,0) and (-2,-2)
10. (1,1) and (1,9)
11. (-3,0) and (1, 1)
12. (-3, -3) and (1,-1)
13. (-1,2) and (0,-2)
14. (-2,-4) and (1,0)
15. (-3,-1) and (-1,3)
16. (-2, 0) and (3,-1)
17. (-4, -3) and (4,3)
18. (-1,4) and (2,3)

Answers

Answer:

1 is 3

2 is-4

3 undefined

4 is 0

5 undefined

6 1.25

7 1.5

8 5

9 -2

10 -4

11 6

12 undefined

13 0

14 -1

15 2

16 -9

17  4

18 5

Step-by-step explanation:

Find the gcf of 12,18 and 24( must be a factor of all numbers)

Answers

6 I think! I hope it’s right I did that type of math a while ago but I’m pretty sure it’s 6! Please tell me if I’m wrong ‘ouo

solve 5 and 6 please

Answers

Oh yeah I guess I just don’t want you anymore I love it lol I don’t want to see it lol

whats the slope of (10,8) and (-15, 18)

Answers

The slope is
10/-25
Simplified its
2/-5

Answer:

[tex]m=-\frac{2}{5}[/tex]

Step-by-step explanation:

what are the coordinates of the point ? SHOW STEP BY STEP

Answers

Answer:

(3, 0)

Step-by-step explanation:

Use the formula:

[tex]\frac{a}{a+b}[/tex](x2 - x1) + x1, [tex]\frac{a}{a+b}[/tex](y2 - y1) + y1

a and b are the numbers in the ratio: a:b

Substitute everything into the equation.

2/2+1(6 - -3) + (-3)

2/2+1(1 - -2) + (-2)

Now combine like terms.

2/3(9) -3

2/3(3) -2

Solve.

6 - 3

2 - 2

(3, 0)

I hope this helps!

Alison has 63 books on her bookshelf. If she plans on donating % of her books, how many will Alison have left on her bookshelf?​

Answers

Answer:

i cant answer if i dont know how much books she wants to donate

Answer:

How much is she donating ?

Step-by-step explanation:

I will give brainlist

Answers

Answer:

7

Step-by-step explanation:

Square ABCD has diagonals AC¯¯¯¯¯

and BD¯¯¯¯¯

. What is m∠ABD

A

180º

B

90º

C

45º

D

360º

Answers

Answer:

option (c)

Step-by-step explanation:

Given,

ABCD is a square.

AC and BD are diagonals

We know that,

Sides of the square make 90 degrees with each other.

And Diagonals bisect the opposite angles of the square.

Now,

[tex]\angle ABD = \dfrac{\angle ABC}{2}[/tex]

[tex]\angle ABC = 90^\circ[/tex]

[tex]\angle ABD = \dfrac{\angle ABC}{2}[/tex]

[tex]\angle ABD = \dfrac{90^\circ}{2}[/tex]

[tex]\angle ABD = 45^\circ[/tex]

Hence, option (c) is correct.

Please help me if you can​

Answers

Answer:

1)-9x^5 + 7x^2 + 3    2)  -2x2 • (x - 7)      3)  -23v^2 + 7v + 4    4) is just 7x


A ladder rests 22 feet up the side of a building. If the base of the ladder is 20 feet away from the building, how tall is the ladder to the nearest hundredth?

Answers

Answer:

Length of ladder =L =15

Distance from wall = D =9

Height on wall = H =??

Pythagoras equation L*L = D*D + H*H

15×15= (9×9) + H×H

225-81 = 144 =HxH

H= 12 feet.

I am right or wrong

please check

7th grade math , help me pleasee :(

Answers

Answer: translate 10 units down, then reflect across the y axis

Step-by-step explanation:

Answr unit is 10


Step by step explanation

what is the slope of the line?

Answers

Slope:0
Y intercept: -2
Do you still need help my guy?

ramon can currently bench press 70 pounds.he wants to increase his bench by 30% over the next 4 months.how much does he need to bench press to meet his goal

Answers

10 to 15 pounds per month is about average for beginner lifters. Beginners will increase their bench faster than more advanced lifters.

Makayla has 5 yards of ribbon to use for a craft project. She cuts the ribbon into pieces that are yard long.
How many pieces of ribbon does Makayla have?

Answers

Answer:

20

Step-by-step explanation:

If she has 5 yards and she cuts them into 1/4 each. You're basically multiplying 5 by 4, and that's 20.

What are the answers to the last two questions?

Answers

Answer:

[tex](-1)(x+3)(x-2)[/tex]

Step-by-step explanation:

Factoring

We are given a trinomial:

[tex]-x^2-x+6[/tex]

The following steps are done to factor the trinomial.

1. Confirm there are no common factors: No common factors (given)

2. Factor out -1:

Multiply all the terms by -1 and take -1 out:

[tex]\boxed{(-1)(x^2+x-6)}[/tex]

3. Factor

[tex]x^2+x-6 = (x+p)(x+q)[/tex]

We have to find two numbers p and q whose product is -6 and the sum is 1. Those numbers are 3 and -2 (in any order):

Factoring:

[tex]x^2+x-6 = (x+3)(x-2)[/tex]

The final factoring is:

[tex]\boxed{(-1)(x+3)(x-2)}[/tex]

Can you guys help me ;) first person to help will get brainlist

Answers

i might be wrong, but i think it’s the A.
the measurements have little difference, so it will be very close to an equilateral rather a right triangle.

Helppp me faststttttt plzzzzzfreeee points

Answers

Ummm Hey I can help you

2) You have 4 Dragon Ball Z drawings and 5
Pokemon drawings. Your brother has the same
ratio of Dragon Ball Z to Pokemon drawings,
only he has 10 Dragon Ball Z drawings. How
many Pokemon drawing does he have? Show
your work. (Hint, you can have a fraction of a
drawing if it is part way done).

Answers

Answer:

4z:5p

4+5=9

10/9=1.11111...

1.11111*5=5.55555......or 50/9 or 5 5/9

Step-by-step explanation:

Answer:

guess what I don't know

Step-by-step explanation:

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