1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vikentia [17]
3 years ago
12

Help me with both of these answers please

Mathematics
1 answer:
kiruha [24]3 years ago
8 0

Answer:

Step-by-step explanation:

Proportional.

y = 9x

The constant is 9

You might be interested in
43 coins, no nickels, $4.51 equal amount amount of pennies and dimes, how many of each coin
Sonbull [250]
Set up
Let the dimes = d
Let the pennies = p
Let the quarters = q

Equations
You cannot mean that the pennies and dimes have equal numbers. That would mean that each had 21.5 members. Now could you mean that the dime and penny amount could be the same with 43 coins that total 4.00. Four dollars means that you need 40 dimes alone. It must mean that you are including quarters. 

p + d + p = 43          (1)
p = d                        (2)
p +10d +25q = 451  (3)

Note how this last equation = was derived. You have to multiply the dimes by 10 and he quarters by 100 and the total by 100 to get the numbers all in pennies.

Put the results of 2 into 1.
2p  + q = 43                   (4)  
You need to modify equation 3 as well.
p + 10p + 25q = 451
11p + 25q  = 451           (5)

Solve the new equations
2p +  q = 43               (4)
11p + 25q = 451        (5)

Multiply 4 by 25
25(2p- + q = 43)
50p + 25q = 1075     (6)  Subtract (5) from (6)
<u>11p + 25q = 451
</u>39p = 624                        Divide by 39
p = 624 / 39
p = 16

Since the pennies and dimes are equal there are 16 dimes
p + d + q = 43
16 + 16 + q = 43
32 + q = 43
q = 11

Check
16 + 10*16 + 11*25 = ?
16 + 160 + 275  = ?
451 = ?

Nice problem. Thanks for posting.
3 0
3 years ago
I need the answer ASAP
bixtya [17]

Answer:

I WISH I COULD HELP BUT I CANT SORRY

Step-by-step explanation:

I CANT HELP IM NOT IN YOUR GRADE I'm in middle School

8 0
2 years ago
The length of a rectangle is four times its width. If the area of the rectangle is 324m^2, find its perimeter.
Anuta_ua [19.1K]

Answer:

perimeter=90

Step-by-step explanation:

We know that the length is four times the width, so:

l=4w

We also know the area, which is 324 m². The formula for area:

A=l*w

Insert the known values:

324=(4w)*w

Solve for w. Simplify by removing parentheses:

324=4w*w\\324=4w^2

Divide 4 from both sides to isolate the variable:

\frac{324}{4}=\frac{4w^2}{4}  \\\\81=w^2

Find the square root of both sides:

\sqrt{81} =\sqrt{w^2} \\\\w=9

The width is 9 m.

We know the width. Now find the length by using the area formula and inserting known values:

324=l*9

Solve for l. Divide both sides by 9:

\frac{324}{9}=\frac{l*9}{9}\\\\  l=36

The length of the rectangle is 36. (You can check: 4 times 9 is 36)

Now find the perimeter:

P=2l+2w

Insert values:

P=2(36)+2(9)\\\\P=72+18\\\\P=90

The perimeter is 90 m.

5 0
2 years ago
Suzzy walks ¾ mile around the high school track in ½ hour. How far can she walk in 2 hours?
aleksley [76]

Answer:

Step-by-step explanation:

3/4 + 3/4 = 6/4 = 1 1/2= 1.5 (this is one hour)

1.5 x 2 = 3

she can walk 3 miles in 2 hours.

6 0
3 years ago
Read 2 more answers
Which expression is equivalent to -32 3/5
RSB [31]

Answer:

See below.

Step-by-step explanation:

-32 3/5

= [(-32* 5) + 3] / 5

= -163/5 is one expression.

Another is -32.6 ( because 3/5 = 0.6).

8 0
2 years ago
Read 2 more answers
Other questions:
  • SOLVE THIS QUESTION<br>​
    10·2 answers
  • In triangle KLM, LM =7 and m
    15·2 answers
  • PJ is decorating pupcakes for Rocky’s birthday party. Her color scheme is black,purple,and green.She will use this spinner to de
    10·2 answers
  • Chris bought six pounds of apples for
    5·2 answers
  • –8 ÷ 2 =<br> answer now and free r
    10·2 answers
  • What times what =13?
    8·2 answers
  • Rene is going to the lake to visit some friends. If the lake is 60 miles away and Rene is driving at 40 miles per hour the entir
    5·1 answer
  • Mrs. Kremer uses a 15% off coupon when she buys a camera. The original price of the camera is $225.How much money did she pay fo
    13·1 answer
  • Two hundred- forty times sixty-nine
    10·2 answers
  • Answer this please please please please please ​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!