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4 years ago

Solve for x a:b , cross multiplying, thank you!

Mathematics

1 answer:

ycow [4]4 years ago

8 0

Similar triangles, so 24/32=33/32+x. cross multiply to find that 32*33=24(x+32). this gives you 1056=24x+768. subtract 768 from both sides to get 288 = 24x. divide both sides by 24 to get x=12

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Hiro painted his room. After 3333 hours of painting at a rate of 8888 square meters per hour, he had 28282828 square meters left

lorasvet [3.4K]

Answer:

y = 52 - 8x

Step-by-step explanation:

If he painted for 3 hours at a rate of 8 square meters per hour, the area painted was:

$A_P=8*3=24\ m^2$

If after 24 squared meters painted, there are still 28 left, the total area is:

$A=24+28 = 52\ m^2$

The area still left to paint is initially 52 squared meters and decreases at a rate of 8 square meters per hour, the function that describes the relationship between the area left to paint (y) and number of hours (x) is:

y = 52 - 8x

6 0

3 years ago

D= number of dollars

padilas [110]

Unit rate 4:

The table

d n

4 1

8 2

16 4

Unit rate 1/4:

Table

d n

1 4

4 16

16 64

and

The equation n=4d

Unit rate 16:

Equation:

d = 16n

Step-by-step explanation:

The unit in the unit rate is dollars per unit ounces which means that the unit rate calculated by

$Unit\ rate = \frac{dollars}{ounces}$

So,

The first option is the equation:

$d = 16n\\\frac{d}{n} = 16$

The unit rate is 16 dollars per ounce

The second option is the table:

d n

1 4

4 16

16 64

We can take any pair of values of d and n from the table to calculate the unit rate

So taking

d = 1

n=4

$Unit\ rate = \frac{d}{n}\\= \frac{1}{4}$

The unit rate for table is: 1/4 dollars per ounces

Third option is the equation:

n = 4d

$n = 4d$

dividing both sides by n

$\frac{n}{n} = \frac{4d}{n}\\1 = \frac{4d}{n}$

dividing both sides by 4

$\frac{1}{4} = \frac{4d}{4n}\\\frac{d}{n} = \frac{1}{4}$

the unit rate is 1/4 dollars per ounce

Fourth option is the table:

d n

4 1

8 2

16 4

We will take any pair of d and n to find the unit rate

So,

Taking

d = 4

n =1

$Unit\ rate = \frac{d}{n} \\= \frac{4}{1}\\=4$

The unit rate is 4 dollars per unit ounce.

Keywords: Unit rate, units

Learn more about unit rate at:

#LearnwithBrainly

7 0

3 years ago

In a sale, a blow dryer is marked down from $18.98 to $11.39. What is the percent decrease?

Daniel [21]

The answer is: 40%

Hope this helps!

6 0

3 years ago

Sally had $26. Then she earned some more money doing chores.

stich3 [128]

Answer:

Step-by-step explanation:

Sally started with $26 and ended with $35 meaning she earned money

If she began with a lower number than she started with, you have to subtract the greater number by the lower to find the difference

35-26 = 9

THEREFORE she made $9 doing chores

3 0

3 years ago

Read 2 more answers

I need helppp on my test and i can't get it wrongggg

Artyom0805 [142]

Answer:

Perimeter = 16x + 16

Area = 40x + 15

Step-by-step explanation:

Perimeter = the sum of all the side lengths

Perimeter = 2(8x+3) + 2(5) = 16x + 6 + 10 = 16x + 16

Area = product of base times height

Area = (8x+3)*5 = 40x + 15

6 0

3 years ago