Solve the system of equations 3x – 3y = 30 and 2x + y = 11 by
combining the equations.

Answers

Answer 1
Times bottom equation by 3 and top by 2 to get the same coefficient of x
6x-6y=60
6x+3y=33
Minus the bottom by the top
-9y=27
y=-3
substitute this in to one of the equations
2x -3 = 11
add 3 to both sides
2x=14
x=7

Related Questions

Help me with this ASPA

Answers

Answer:

The answer is 2

Step-by-step explanation:

By using (0,_3) and (2,1)

Then

[tex]m = \frac{1 - ( - 3)}{2 - 0} = \frac{4}{2} = 2[/tex]

Which equations are equivalent to -1/4(x)+3/4=12? Select all that apply.

(-4x/1)+3/4=12

-1(x/4)+3/4=12

-x+3/4=12

1/4(x+3)=12

(-x/4)+3/4=12



HELP

Answers

Answer:

B and E

Step-by-step explanation:

B,C,E

is the full answer

Find the common difference of the arithmetic sequence. −16,−12,−8,−4,..

Answers

it’s 4
you work out the difference between each term

What is the slope of this line ?
Answers : 2, 1/2, 4, and -4

Answers

Answer:

2

Step-by-step explanation:

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

[tex]\frac{rise}{run}=\frac{2}{1} =2[/tex]

good luck, i hope this helps :)

Answer:

2

Step-by-step explanation:

Thinks its 2 because every 1 on the x 2 on the y increases

Someone help me with this

Answers

Answer:

116

Step-by-step explanation:

They are corresponding angles and therefore will be congruent :) Hope that helps!

The answer would be 116 plz mark me as brainliest!

Claire received 3/8 of her allowance on Monday. What decimal shows the part of her allowance that she received?
0.375
0.75
0.83
2.6

Answers

Answer:

0.375

Step-by-step explanation:

3/8 = 0.375

At a dance, 25% dresses up in a superhero costume, 32% as a scary character, 10% as an entertainer, 15% as a children's movie character, and 16% did not dress up at all. If a total of 250 students attended the dance and 15% of the scary character students were girls, how many boys dressed up as a scary character? ​

Answers

Answer:

68 boys

Step-by-step explanation:

32% of 250 = 80

of 80 scary characters, 15% were girls

80 x .15 = 12 (girls)

80 - 12 = 68 (boys)

can someone help me with this please, i am not sure what to do

Answers

Answer:

I attached the graph below

Step-by-step explanation:

I started at the y-intercept, because it is where the line crosses the y-axis.  Then, I used rise/run for the slope (-5/3) and went down 5 units and right 3 units.  I connected the points to make the graph.  

Find the value of x : x/15 = 8/20

Answers

Answer:

x=6

Step-by-step explanation:

Answer:

x=6

Step-by-step explanation:

x/15=8/20

Multiply both sides by 10:

x/15*10=8/20*10

Simplify:8/20*10

2x/3=4

Multiply both sides by 3:

3*2x/3=4*3

simplify:

2x=12

Divide both sides by 2:

2x/2=12/2

Simplify:

x=6

Noah already has $10.50, and he earns $3 each time he runs an errand for
his neighbor. Noah wants to know how many errands he needs to run to
have at least $30.*
what is the inequality?

Answers

Answer:

3e + 10.50 ≥ 30

Step-by-step explanation:

The sum of two numbers is 46 and their
difference is 20. What is the smaller
number?
1
A) 40
B) 13
C) 26
D) 12

Answers

46/2 is 23
20/2 is 10
The number is + or - 23
So 13 and 33
13

Answer:

B. 13

Step-by-step explanation:

We have two unknown numbers, let's have two variables for these two unknown numbers, X and Y.

"The sum of two numbers is 46 and their difference is 20."

Meaning we have two equations :

X + Y = 46

X - Y = 20

Looking at the last part of "their difference is 20." We can assume X = Y + 20

So substitute the assumed equation into X + Y = 46

(Y + 20) + Y = 46

2y + 20 = 46

Subtract 20 from both sides :

2y = 26

Divide 2 by both sides :

y = 13

There you go.

s=2πcx+3πc^2 solve for x

Answers

Answer:

x = (s - 3πc^2) / 2πc.

Step-by-step explanation:

s = 2πcx + 3πc^2

2πcx  = s - 3πc^2

x = (s - 3πc^2) / 2πc.

xis directly proportional to y.
When x=21, then y=3.
a) Express x in terms ofy.
b) Find the value ofx when y is equal to 10.​

Answers

x = k x y
21 = k x 3
k = 7
x = 7y

x = 7(10)
x = 70

find the value of A
75°,110°,90°

Answers

Answer:

I think it is 90° because on a line it is 180 and and both add up to 360°

A is 85
Hope it helps

Pls help tell me how to do it

Answers

(13 * 17) /2 = 110.5


Explanation: b * h / 2

The first snack is 270 calories for 3 servings, and the second snack is 450 calories How many servings does the snack have to have in order to equivalent to the first snack?

Answers

Answer:

5 servings

Step-by-step explanation:

Given that:

For a particular first snack  to be = 270 calories;

the servings = 3

Then, for the second snack, the calories = 450.

To estimate the servings for the second snack; we need to equate the first snack with the second snack.

Let y be the value of the unknown second snack

Then:

270 calories = 3 servings

450 calories = y servings

y servings = (450 calories × 3 servings) / 270 calories

y servings = 5 servings

Thus; the second snack needs to have 5 servings in order to be equivalent to the first snack

You have $40 in a savings account and you deposit an equal amount into your account each week. After 8 weeks the account holds $128. Write an equation that represents the amount y (in dollars) of money in the account after x weeks.​

Answers

Answer:

40+x=y

Step-by-step explanation:

-5.8c +4.2 - 3.1 + 1.4c​

Answers

Answer:

1.1 - 4.4c

Step-by-step explanation:

(-5.8c +1.4c​)+ (+4.2 - 3.1)

A point S( 8,-2) is reflected across the origin, Find the order pair of its image.



A. ( -8 , 2)


B. ( -8, -2)


C. (2, 8)


D. ( 2,- 8)

Answers

Answer:

the answer is B

Step-by-step explanation:

Do your best

what is the solution set of this inequality x < -10 i need help

Answers

Answer:

x= 1 (any number greater than -10)

Step-by-step explanation:

">" this sign shows that any number greater than -10 can be x. There is no specific answer.

Answer:

The solution set of an inequality is < (less than) or > (greater than) to compare two or more numbers. Example 12 > - 10.

Step-by-step explanation:

When comparing two numbers, like 5 and 8, you probably recognize that the number 5 is less than the number 8. You probably also realize that the number 8 is greater than the number 5. In math, we use the inequality symbols < and > to compare two or more numbers.

Justin typically makes 85% of his free throws in basketball. If he attempts 20 free throws, how many would he be
expected to make?

Answers

Answer:

17

Step-by-step explanation:

HELP WILL GIVE BRAINLIEST Triangle QRS and triangle WXY are similar. Which statement must be true?

Answers

Answer:

C.

Step-by-step explanation:

This is correct because the triangles are similar. Angle S is similar to Angle Y, and Angle R is similar to Angle X.

None of the others can be correct either.

Hope it helps!

There were 220 people who voted at the 6th grade meeting. Sixty percent of the voters are in favor of changing the school mascot. How many people are against changing the mascot? Use numbers and words to explain your answer.

Answers

Step-by-step explanation:

First I had to find 60% of 220.

220 × .60 = 132.

132 people are in favor so I have to subtract that number from 220 to find how many people were against.

220-132 = 88

88 people were against changing the mascot.

in this diagram, circle A has radius = 5.6 and DC = 8. BC is tangent line, calculate the distance of BC.

Answers

Answer:

13.6 is the distance of BC

OMG HELP MEEEEEEEeeeeeeeeeeeeeeeeeeeeeeeeeeee

Answers

Answer:

78

Step-by-step explanation:

*6 on both sides

13*6=d/6*6

Eliz spends $16.25 each month on song downloads. At this amount, how much will Eliz spend on song downloads after two years
?

Answers

Answer:

$390.00

Step-by-step explanation:

$16.25×24=390.00

=$390.00

(3x-2 over 4) - (2x-5 over 3) = (1+x over 6)

Answers

x = 12

multiply both sides by 12 then expand the brackets and simplify
X= 12 hope you like it

On three days, Ben throws darts at a target.

Here are his results.

Number of throws

Number of hits

Number of misses

40

30

10

30

18

Monday

Tuesday

Wednesday

Total

12

50

36

14

120

84

36


b) Use the total of the results to estimate the

probability of Ben of hitting the target.

Answers

Answer:

[tex]P(Hits) = 0.70[/tex]

Step-by-step explanation:

Given

[tex]Throws = 120[/tex]

[tex]Hits = 84[/tex]

[tex]Miss = 36[/tex]

See attachment for result

Required

Determine the probability of hitting the target

This calculated using:

[tex]P(Hits) = \frac{n(Hits)}{n(Throws)}\\[/tex]

[tex]P(Hits) = \frac{84}{120}[/tex]

[tex]P(Hits) = 0.70[/tex]

Hence, the probability of hitting the target is 0.70

what is the additive inverse of -15 and 15

Answers

For -15 its 15, and for 15 it's -15

Answer

-15

Step-by-step explanation:

whats the line in fully simplified slope form pls help me.

Answers

Answer:

y =  -5/6x - 7

Step-by-step explanation:

The answer is y=-5/6x-7
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