MATHEMATICS MIDDLE SCHOOL

Which coordnates represent a point on the graph of 3y = 5x - 13?A. (0,-13)
B. (3,1)
C. (7,7)
D. (-6,-1)

Answers

Answer 1
Answer: (x,y)
sub given points and see if true

A, (0,-13)
x=0
y=-13
3(-13)=5(0)-13
-39=0-13
-39=-13
false (other user was just guessing)

B. (3,1)
x=3,
y=1
3(1)=5(3)-13
3=15-13
3=2
false

C. (7,7)
x=7
y=7
3(7)=5(7)-13
21=35-13
21=22
false

D. (-6,-1)
3(-1)=5(-6)-13
-3=-30-13
-3=-43
false

answer is none of them

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Answer soon!! ThanksTranslate the following into an equation:
A number x is decreased by 45. The result is then divided by 12. Then 20 is added to this new result to give a final result of five times the difference of 32 and the number x

Answers

(This is a little difficult but I've got it)

((x - 45)/12) + 20 = 5(32 - x)

(I made the equation a little more complex than I should have but that equation should still work if you were to solve for x)

Hey there!!

Let's get this step by step

x is decreased by 45 = x - 45

Result is divided by 12 = ( x - 45 ) / 12

Then, 20 is added to the result

[ ( x - 45 ) / 12 ] + 20

Result =

Five times the difference of 32 and x = 5 ( 32 - x )

Hence, the equation

[ ( x - 45 ) / 12 ] + 20 = 5 ( 32 - x )

( x - 195 ) / 12 = 160 - 5x

Multiply 12 on both sides

x - 195 = 12 ( 160 - 5x )

x - 195 = 1920 - 60x

Add 60x on both sides and add 195 on both sides

61x = 2115

divide by 61 on both sides

x = 34.67

x = 34.7

Hence, the required answer is 34.7 this can be rounded to 35

Hope my answer helps!

Tammy wants to get change for $.30. The only coins she can get are quarters, nickels and dimes. How many different ways can she get $.30 using only these coins?

Answers

1. One quater and one nicle   2. Three Dimes   3. 6 nickels 4. One dime and four nickles 5. two nickles and two dimes  i think

Explain the difference between rational numbers and integers.

Answers

Rational numbers are positive and negative numbers that can be said or seen fully (ex. 5 or 2.391); unlike irrational numbers that go on forever like pi.

Integers are negative and positive whole numbers, that do not include fractions or decimals. (ex. -1, 0, 50, -230)

a bag containes 8 white marbels and 48 green marbles. If a representative sample contains 2 white marblesthen how many green marbles would you expect it to contain?

Answers

Answer:

12

Step-by-step explanation:

8 white marbles and 48 marbles

each sample contains 2 white

so first

8 divide 2 = 4

then second

48 divide 4=  12

hope this helps

The value of x in 3(x+5)=12

Answers

Answer:

x = -1

Step-by-step explanation:

3(x+5)=12

Divide each side by 3

3/3(x+5)=12/3

x+5 = 4

Subtract 5 from each side

x+5-5 = 4-5

x = -1

Answer:

x=-1

Step-by-step explanation:

3(x+5)=12

Step 1: Simplify both sides of the equation.

3(x+5)=12

(3)(x)+(3)(5)=12(Distribute)

3x+15=12

Step 2: Subtract 15 from both sides.

3x+15−15=12−15

3x=−3

Step 3: Divide both sides by 3.

3x

3

=

−3

3

x=−1

The cost in dollars to print n books is 500 + 10n.How many books are printed for a cost of $15 000?

Answers

500 + 10n = 15,000

Subtract 500 from each side:

10n = 14,500

Divide each side by 10 :

n = 1,450 books
500+10n=15.000 \n \n 500-500+10n =15.000-500 \n \n 10n=14.500 \n \n n= (14.500)/(10) \n \n \boxed{n=1.450}
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