(30 POINTS COME AND GET IT FOR A MULTIPLE CHOUCE XD) which of the following is the solution for s in the system of equation shown below? R+2s=52
2r-s=4
(1)12
(2)15
(3)17
(4)20

Answers

Answer 1

Answer:

(4) s = 20

Step-by-step explanation:

Given system:

r + 2s = 522r - s = 4

Eliminate r to solve for s.

To do so, double the first equation and then subtract the second one:

2r + 4s = 1042r - s = 4

Subtract

4s - (-s) = 104 - 45s = 100s = 100/5s = 20

Correct choice is (4) 20


Related Questions

solve for a.

a + (-7) = -17

A. a = -24

B. = -10

C. a = 10

D. a = 24

Answers

Answer:

the answer is A

Step-by-step explanation:

-17 - (-7) = -24

a = -24

Answer:

b) a = -10

Step-by-step explanation:

a + (-7) = -17

simplify

a - 7 = -17

add 7 to both sides of the equation

a - 7 + 7 = -17 + 7

a = -17 + 7

a = -10

At dinner, the meal cost $24 and the sales tax was $1.32. What was the tax rate? Write your answer as the percent with no % sign

Answers

Answer:

5.5

Step-by-step explanation:

Sales tax = tax rate × Cost of meal

Sales tax = $1.32

Tax rate = x%

Cost of meal = $24

Sales tax = tax rate × Cost of meal

1.32 = x% × 24

1.32 = x/100 × 24

1.32 = 24x/100

1.32 * 100 = 24x

132 = 24x

x = 132/24

x = 5.5%

= 5.5

What is the constant in this expression 4x+5y-3? (3 points) a 4x b y c 5 d 3

Answers

Answer:

-3 is a constant.

Step-by-step explanation:

The given equation is :

4x+5y-3 ...(1)

The general equation is :

ax+by+c ...(2)

c is a constant

If we compare equations (1) and (2), we find that.

c=-3

Hence, the constant in this expression is -3.

Maria and her friend ride their bikes. They start at 12:47 and end at 2:29. How long did they ride their bikes for?

Answers

Answer:

Their bide ride was 1 hour and 42 minutes

if one face of a cube has an area of 6.75 square inches , what is the surface area of the entire cube ?​

Answers

Answer:

40.5

Step-by-step explanation:

a cube has 6 faces so 6.75 x 6 = 40.5

Choose the correct equation for the line shown on the graph?



y = x - 1
y = - x - 1
y = x - 4
y = - x - 4

Answers

Answer:

y=-x-1

Step-by-step explanation:

Y =x-1......... I think

The cost price of a car is 450 naira and the selling price is 504 naira what is the percentage again

Answers

Answer:

12%

Step-by-step explanation:

The car is sold at a gain because its selling price is greater than cost price

Profit = [(selling price - cost price) / cost price ] x 100

[tex]\frac{504 - 450}{450}[/tex] x 100

[tex]\frac{54}{450}[/tex] x 100 = 12%.

Which relationships describe the angle pair x° and 157°? Select each correct answer. O complementary angles 1570 O supplementary angles o adjacent angles vertical angles​

Answers

Answer:

Supplementary angles and adjacent angle

Step-by-step explanation:

Both angles x° and angle 157° are supplementary ; this is because the sum of both angles should add up to 180°.Looking closely, each both angles will combine to form angle on a Straight line which from angle theorem adds up to 180°.

Also both angles x° and 157° are adjacent angles most simply because they share a common vertex(this can be interpreted as the point of intersection of the two lines which makes up the diagram.)

7 penguins for $188.88 ________ each

Answers

Answer:

$26.98 each

Step-by-step explanation:

Answer:

Approximately $26.98 each

Step-by-step explanation:

Divide 188.88 by 7 to get the cost for each. The round to the nearest hundredth.

1) Danielle earns 9% commission on all the makeup sales she makes. This past week she sold $895 worth of makeup. How much money did Danielle earn from her sales? *


Can someone plz answer this ​

Answers

Answer:

$80.55

Step-by-step explanation:

9% of 895 = 80.55

pls help asap what is the area of this figure ​

Answers

Answer:

255

Step-by-step explanation:

Mark Me Brainliest Please

Please help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee


show your work

Answers

Answer:

61

Step-by-step explanation:

1/5 = .2

so you do 12.2 / .2 which gives you 61

Answer:

Your answer is 61

Step-by-step explanation:

Step 1.  Convert 12.2 into a fraction. (I chose to put 12.2 over 10 so in the end it's 122/10.)

Step 2. Layout your problem

Remeber when dividing fractions it Keep, Change, Flip.

122/10 x 5/1

Step 3. Solve

122/10 x 5/1 = 61

That should be your answer to the problem :)

9x - 6y = -21 and 6x - 12y = -6 How would I solve by substitution?

Answers

Answer:

(-3,-1)

Step-by-step explanation:

6x-12y=-6

6x=12y-6

x=2y-1

9(2y-1)-6y= -21

18y-9-6y=-21

12y= -12

y=-1

6x-12(-1)=-6

6x+12= -6

6x=-18

x=-3

Answer:

x = -3 ; y = -1

Step-by-step explanation:

Let 9x - 6y = -21 be eqn.1 & let 6x - 12y = -6 be eqn.2 .

Lets find the value of x from eqn.1

[tex]9x - 6y= -21[/tex]

[tex]=> 3(3x - 2y) = -21[/tex]

[tex]=> 3x - 2y = \frac{-21}{3} = -7[/tex]

[tex]=> x = \frac{2y - 7}{3}[/tex]

Now , lets put the value of x (which we got from eqn.1) in eqn.2 :-

[tex]6x - 12y = -6[/tex]

[tex]=> 6(x - 2y) = -6[/tex]

[tex]=> x - 2y = \frac{-6}{6} = -1[/tex]

(Putting x here)

[tex]=> \frac{2y - 7}{3} - 2y = -1[/tex]

[tex]=> \frac{2y - 7 - 6x}{3} = - 1[/tex]

[tex]=> -4 y - 7 = -1 \times 3 = -3[/tex]

[tex]=> -4y = 7 - 3 = 4[/tex]

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

Now , lets find the value of x.

[tex]x = \frac{2y - 7}{3}[/tex]

Putting y = -0.5 gives ,

[tex]x = \frac{[2 \times (-1)] - 7}{3}[/tex]

[tex]=> x = \frac{-2 - 7}{3} = \frac{-9}{3} = -3[/tex]

is my fourth answer right or wrong

Answers

Answer: Right

Step-by-step explanation:

Answer:

Your answers for #2 and #4 are incorrect.

Step-by-step explanation:

For #2:

For one half hour in the garage, simply divide the one hour rate in half. 5/2= 2.5

For #4:

For 1.75 hours in the garage, the answer will be less than your answer for two hours. So, if 2hrs is $10, then the answer for 1.75 hrs must be 7.5

HELP ASAP!!!!
PLEASE HELP

Answers

Answer:

b=7/33 c= 14/33

Step-by-step explanation:

Repeat all 21 they are repeating decimals

for b its 100x-x=21.21 repeating the 21 -0.21 repeating the 21 = 100x-1x=(21+0.21)-0.21= (100-1)x=21+0.21-0.21 [ stop repeating the 21's up to here] and 99x=21+0 = 99x=21 = 99x/99=21/99 both 99's cancel leaving 3x7 divided by 3x33 = x= cancel both 3's leaving 7 over 33 This should help you learn to solve c good luck

Clare has a recipe for yellow cake she uses 9 1/3 cups of flour to make 4 cakes. Noah will follow the same recipe. He will make c cakes using f cups of flour. What equation would show the relationship between cake and flour?

Answers

Answer:

[tex]c=\frac{3}{7}f[/tex]

Step-by-step explanation:

Clare uses [tex]9\frac{1}{3}[/tex] cups of flour to make 4 cakes.

Noah follows the same recipe so the ratio of the ingredients used will be proportional.

If Noah uses f cups of flour for c cakes,

[tex]\frac{c}{f} =\frac{4}{9\frac{1}{3}}[/tex]

[tex]\frac{c}{f} =\frac{4}{\frac{28}{3}}[/tex]

[tex]\frac{c}{f} =\frac{4\times 3}{28}[/tex]

[tex]c=\frac{3}{7}f[/tex]

Therefore, relation between cake and flour used is,

[tex]c=\frac{3}{7}f[/tex]

6x2-2x3+x4
Please help

Answers

Answer:

it's  equals 7

Step-by-step explanation:

The graph of y = f(x) is the solid black graph below. Which function represents the dotted graph?

Answers

Answer:

C (The lower left one)

Step-by-step explanation:

I saw that the vertex was equal to (-1,1) and that is the only answer that makes sense

The graph of the function y = x shifted 1 unit up and moved 1 unit to the left

so the new function is now y = (x + 1) + 1.

What is a graph?

The set of ordered pairings (x, y) where f(x) = y makes up the graph of a function.

These pairs are Cartesian coordinates of points in two-dimensional space and so constitute a subset of this plane in the general case when f(x) are real values.

By observing the figure we conclude that it shifted 1 unit up and moved 1 unit to the left.

If the original graph was y = x now it is y = (x + 1) + 1.

learn more about graphs here :

https://brainly.com/question/2288321

#SPJ5

A kangaroo hops 2 kilometers in 3 minutes. At this rate how long does it take the kangaroo to travel 3 kilometers?

Answers

Answer:

4 minutes 3 seconds

Step-by-step explanation:

Step one:

Given data

A kangaroo hops 2 kilometers in 3 minutes

The rate/speed is

rate/speed= 2/3 km per minute

Required

the time taken to cover 3 km

Step two:

We know that

rate= distance/time

2/3= 3/t

cross multiply we have

2t=3*3

2t=9

divide both sides by 2

t= 9/2

t= 4.5 minutes

t= 4 minutes 3 seconds

I need help quick!!!!!!!!

Answers

Answer:

Step-by-step explanation:

Plants need carbon dioxide this enables them to photosynthesis and produces oxygen

So A is the correct answer

in school there are 450 students in total. if 2/3 are boys, find the number of girls in the school​

Answers

ANSWER: 150

Step-by-step explanation:

2/3 of 450 is 300

450-300=150

Suppose y varies at a constant rate of change of 0.5 with respect to x (so that Δ y = 0.5 ⋅ Δ x ), and y = 1.5 when x = 3 .

Answers

Answer and explanation:

Given the above, we find y in terms x

change in y change in x = 0.5

The formula for a straight line is y= mx+b where m is slope of the line and b is the y intercept

We substitute given values above in the straight line equation:

y=mx+b

1.5= 0.5×3+b

1.5=1.5+b

b= 0

y in terms of x for the line is therefore given by the formula :

y=0.5x+0

What is the transformation of y= (x + 3)2 + 2 from the parent function
y = x²?

Answers

Answer:

sdgghjjkugzdbhgfbufsfh

HELP PLEASE!!!!! I NEED IT DONE SOON

Answers

Answer:

AB

Step-by-step explanation:

Janice rolls a fair number cube sixty times. She rolled the number four 12 times.
What is the experimental probability of rolling the number four?

Answers

Answer:0.5

Step-by-step explanation:

60➗12

Probability of an event is the measure of its chance of occurrence. The experimental probability of Janice rolling the number four is 0.2

What is experimental probability?

Experimental probability calculates the probability of some event from the results of experiments.

For an event E, we get the experimental probability of that event

[tex]P_e(E) = \dfrac{\text{Number of times E occurred}}{\text{Number of times experiments was done}}[/tex]

where, [tex]P_e(E)[/tex] is denoting experimental probability of occurrence of E.

For this case, we're specified that:

The event in consideration is "Rolling the number 4"

The times she rolled the number 4 is: 12

She got four 12 times in 60 rolls of the considered cube.

Thus, we have:

E = Rolling the number 4 on the considered cubeNumber of times E occured = 12Number of times experiment was done = 60

Thus, we get:

[tex]P_e(E) = \dfrac{\text{Number of times E occurred}}{\text{Number of times experiments was done}} = \dfrac{12}{60} = \dfrac{1}{5} = 0.2[/tex]

Thus, the experimental probability of Janice rolling the number four is 0.2

Learn more about experimental probability here:

https://brainly.com/question/2547434

Helpppp pleaseeeee??????

Answers

number A is ur answer hope this helpsss

suppose you had a new candy jar with the same ratio of jolly ranchers to jawbreakers as shown above, but it contained 100 jolly ranchers. how many jawbreakers would you have?

Answers

Answer:

100

Step-by-step explanation:

if its the same then its 100

X = 1 y = -8 Are the two linear equations parallel, perpendicular, or neither?​

Answers

Answer: Perpendicular

Step-by-step explanation:

Write an equation that represents the graph

Answers

Answer:3:40 ratio

Step-by-step explanation:

Given the point (−5,2), write the coordinates of a point that is related by a reflection over the -axis. Write your answer with a comma and no spaces.

Answers

Answer:

hmmmmmmmmmmmmmm ,   hmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

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