Solve for x based on the following system of equations:
x + y = 5
2x + 3y = 20

-10
-5
-2
5
10​

Answers

Answer 1

Answer:

x = -5

Step-by-step explanation:

x + y = 5 can be also written as 3x + 3y = 15 by times 3 on both side, let it be equation (1), then let 2x + 3y = 20 be equation (2), then use equation (2) - (1), can get (2x - 3x) + (3y - 3y) = 20 - 15 ---> -x = 5, then x = -5.


Related Questions

PLEASE HELPPPP! 50 points, my brain has been doing homework all night and this is simple math ;-; I just cant think rn its 7th grade math. Thanks a million!

Jamal reads every day. He read 55 pages on Tuesday, which is 25% less than what he read on Monday. How many total pages did Jamal read on Monday and Tuesday? Write solution as a mixed number.

Answers

Answer:

68/.75

‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎

help me noww i neex helppppp

Answers

x = 135 degrees

Angles on a straight line measures 180 degrees

Therefore subtract 45 degrees from 180 degrees and the total is x.

DOES THIS HAVE ONE SOLUTION , NO SOLUTIONS ,OR INFINITELY MANY SOLUTIONS?! 30 points

Answers

Answer:

INFINITELY MANY SOLUTIONS

Step-by-step explanation:

INFINITELY MANY SOLUTIONS

Infinitely many solutions

Help me pleaseeee:

Find the value of a and b when x=10

a = 5x (squared) ÷ 2

b = 2x (squared) (x-5) ÷ 10x

Answers

My guesses would be:

a 1250
b. 20

can you help me with my question​

Answers

Answer:

im pretty sure its undefined

Step-by-step explanation:

I'd say this because i don't believe you can do anything with the info they give you

Someone HELP ASAPPPP PLZZ

Answers

Answer:

C

Step-by-step explanation:

hope this helps.

the correct answer would be option 2

Pls help I don’t understand I’ll give brainliest

Answers

Answer:

[tex] - 32[/tex]

Step-by-step explanation:

1) Simplify

[tex] \sqrt{32} \: to \: 4 \sqrt{2} [/tex]

[tex] - 8 \sqrt{2} \times \frac{1}{2} \times 4 \sqrt{2} [/tex]

2) Use this formula: a/b × c/d = ac/bd.

[tex] - \frac{8 \sqrt{2} \times 1 \times 4 \sqrt{2} }{2} [/tex]

3) Simplify.

[tex] - \frac{32 \sqrt{2 \sqrt{2} } }{2} [/tex]

4)

[tex]simplify \: 32 \sqrt{2 } \sqrt{2} \: to \: 32 \sqrt{4} [/tex]

5) Since 2 × 2 = 4, the square root of 4 is 2.

[tex] - \frac{32 \times 2}{2} [/tex]

6) Simplify 32 × 2 to 64.

[tex] - \frac{64}{2} [/tex]

7) Simplify 64/2 to 32.

[tex] - 32[/tex]

Therefor, the answer is option three -32

Helia invested 4000 AED for 3 years with a compound interest rate of 1.5%, Calculate the worth of her investment at the end of this time period. ( Show each step of your calculation)

Answers

Answer:

4180 AED

Step-by-step explanation:

Given data

Principal= 4000

Time= 3 years

Rate= 1.5%

The compound interest expression is given as

A= P(1+r)^t

substitute

A=4000(1+0.015)^3

A= 4000(1.015)^3

A= 4000*1.045

A= 4180

Hence the worth will be  4180 AED

an angle is 22 degrees smaller than a second angle. the two angles are complementary. what is the measure of the smaller angle? ​

Answers

Let the first angle be x°.

Then the second angle shall be (x - 22)°.

The two angles are complementary. Hence their sum shall be 90°.

First angle + second angle = 90°

=> x° + x° - 22° = 90°

=> 2x° = 112°

=> x° = 56°

Hence first angle = x° = 56°.

Second angle = (x - 22)° = 34°.

HELLOOOOOooOOOoOooOO
HELP MEEEEEEEEEEEEE

Answers

Answer:

it is axes

Step-by-step explanation:

Answer:

I guess its Axes and coordinate plane

Step-by-step explanation:

a coin is flipped and a six-sided die, numbered 1 to 6, is rolled. find the probability of flipping tails and rolling a number less than 3

Answers

Answer:

5/6

Step-by-step explanation:

There is a 1 out of 2 chance that you will roll tails, so the probability is 1/2.

A number less than three is a 2 and 1, so the probability is 2/6.

Add 1/2 + 2/6. (Change 1/2 to 3/6 so you can add.)

3/6 + 2/6 = 5/6

I hope this is correct and helps you!

Can someone plz help me with this one problem plz!!!!

Answers

the answer would be
10
13
16
19

Answer:

x      y

0     10

1      13

2     16

3     19

Step-by-step explanation:

y = 3x + 10

Let x = 0 and evaluate the expression.

y = 3(0) + 10 = 0 + 10 = 10

Let x = 1 and evaluate the expression.

y = 3(1) + 10 = 3 + 10 = 13

Let x = 2 and evaluate the expression.

y = 3(2) + 10 = 6 + 10 = 16

Let x = 3 and evaluate the expression.

y = 3(3) + 10 = 9 + 10 = 19

x      y

0     10

1      13

2     16

3     19

13. A train travels 24 miles in 2 hours. How many miles per hour is the train traveling? *

Answers

Answer:

12 mph

Step-by-step explanation:

24/2 = 12

Answer:

48 miles per hour

Explanation:

24 x 2= 48

How many square floor tiles of side 1/2m are needed to cover the school hall, excluding the room, shown in the diagram below. Please show ALL working.

Answers

Answer:

Step-by-step explanation:

Theo bought a pair of shoes on sale for 20% off the regular price. A
6.50 sales tax was added to the price of the shoes. Which expression
represents the total cost of the shoes with original price s?
A) (0.2s)1.065
B) (0.8s)1.065
C) 0.83 + 1.065s
D) 0.2s + 1.0655

Answers

Answer:

c

Step-by-step explanation:

i think soo

A scatter plot is shown:
what type of association does the graph show between x and y? (4 points)

Linear positive association

Nonlinear positive association

Linear negative association

Nonlinear negative association

Answers

Answer:

linear positive

Step-by-step explanation:

it's prolly too late but i need pts and someone to answer my ? so yea

Answer:

Step-by-step explanation:

Linear Postive

Mr. Kramer's patio is in the shape of a trapezoid. The trapezoid and its dimensions are shown below. What is the area of the patio? A 144 square feet B 360 square feet C 315 square feet D 252 square feet

Answers

Answer:

C 315

Step-by-step explanation:

(12 + 30) * 15/2 = 315

The area of the trapezoidal patio is 252 ft².

What is a trapezoid?

A trapezoid is a polygon that has only one pair of parallel sides. These parallel sides are also called parallel bases of trapezoid. The other two sides of trapezoids are non-parallel and called legs of trapezoids.

Given that, Mr. Kramer's patio is in the shape of a trapezoid, we need to find its area,

So, the area of the trapezoid is = sum of the parallel sides × height/2

= 12 + 30 × 12/2

= 42 × 6

= 252

Hence the area of the trapezoidal patio is 252 ft².

Learn more about trapezoid, click;

https://brainly.com/question/8643562

#SPJ3

A scientist completed
1
3
page of a report each hour. The report was 5 pages long. How long did it take the scientist to complete the report?

A.
1
8
hour

B.
1
15
hour

C.
8 hours

D.
15 hours

Answers

Answer:

D 15

Step-by-step explanation:

it takes her an hour for 1/3 of a page. 1/3 x 3 = 3. 3x5 = 15

Can someone help me with this please? its 1 question.

Answers

Answer:

D

Step-by-step explanation:

The answer is D because its the only graph that matches the actual description

What is the slope of a line that passes through the two points (12, -18) and (11,12)

Answers

The slope is -30 because when u calculate the rise over run it gets to -30
-18 - 12 = -30

12 - 11 = 1

-30 divided by 1 would still be -30.

Please answer and if you do I'll give you brainliest. <3

Answers

Answer:

guy above me is right

Step-by-step explanation:

Slope intercept form of points 0, -4 and -1, 4

Answers

Answer:

[tex]y=\frac{0}{-1} -4[/tex]

Step-by-step explanation:

first, you have to find the slope, and to do that you use this equation [tex]\frac{y2-y1}{x2-x1}[/tex]

     so, now to insert your points (0,-4), (-1,4)

                                                      (x1,y1)  (x2,y2)

[tex]\frac{4-4}{-1-0} = \frac{0}{-1}[/tex]

now that you have the slope you can find the y-intercept of the slope-intercept form by looking at your first point (0,-4) and get -4

- if you were to look at this point on a graph it would be on the y-axis therefore, -4 is the y-intercept [if you don't have a point like this one then you can look at a graph with one of your points and make a slope until you are on the y-axis :)]

therefore, the slope-intercept form is y=[tex]\frac{0}{-1}[/tex] -4

[ps, your slope is a zero slope :)]

Answer:

y = - 8x - 4

Step-by-step explanation:

y = mx + b

"m" is slope, "b" is y-intercept.

( [tex]x_{1}[/tex] , [tex]y_{1}[/tex] )

( [tex]x_{2}[/tex] , [tex]y_{2}[/tex] )

m = [tex]\frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex]

~~~~~~~~~~~~~~~

(0, - 4) are coordinates of y-intercept.

( - 1, 4)

m = [tex]\frac{4 + 4}{-1-0}[/tex] = - 8

y = - 8x - 4

please i need HELP x+y=15 , x-y=3
and

Answers

Answer:

x=9

y=6

Step-by-step explanation:

x+y=15 .............(i)

x-y=3...........(ii)

Subtracting equation (ii) from equation (i)

or,  x+y -(x-y)=15-3

or,  x+y-x+y=12

or,  2y=12

or,  y=12/2

∴y=6

Now,

       Putting the value of y on equation (i),

or,  x+6=15

or,  x=15-6

∴x=9

Which expression is equivalent to -3(1 - y) ?
0-31 - 3y
0-32 + 3y
0-32 - 4
0 -3.2 + y

Answers

Answer:

Whichever one equals 3y - 3

Step-by-step explanation:

I went through your answer choices and they don't really make sense. But if one of these equals 3y-3 then that's your answer.

Show by parentheses that the sum of x and y is to be subtracted from 4 times the sum of x and y​

Answers

Answer:

4(x+y)-(x+y)

Is that your answer

A coin and a dice are tossed at the same time. ​

​Select the list that shows all of the possible outcomes.

Answers

Answer:

H1, H2, H3, H4, H5, H6, T1, T2, T3, T4, T5, T6

1/12

Step-by-step explanation:

ive done this

Triangle HJK and triangle PMK are similar right triangles. The coordinates of all the vertices are integers.
Which statement is true about the slope of HK and the slope of PK?

Answers

Answer:

Step-by-step explanation:

b

Which equation illustrates the Associative Property of Multiplication?
3x)y = 3(xy)
3(x + 2) = 3x + 6
2xy = yx3
3x = 0

Answers

The answer is:
3(x+2)=3x+6

help please ty i will give brainliest

Answers

Answer:

c

Step-by-step explanation:

b^2-4*a*c

81-20*4*1 =1

so you can factorise it to

(p+5) ( p+4 )

what is the circumference of a DVD disc?

Answers

The circumference of a DVD disc is 28.26 cm
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