All categories

3 years ago

What is the value of x?

Mathematics

1 answer:

Hoochie [10]3 years ago

3 0

Answer:

Answer 7

Step-by-step explanation:

This depends on setting up a proportion

5:45 :: 3: 3 + 2x + 10

You can reduce 5 / 45

5/45 = 1/9

1:9 :: 3:3 + 2x + 10

1:9 :: 3: 2x + 13

1/9 = 3/(2x + 13) Cross Multiply

2x + 13 = 3*9

2x + 13 = 27 Subtract 13

2x + 13 - 13 = 27 - 13

2x = 14 Divide by 2

2x/2 = 14/2 Divide

x = 7

You might be interested in

13 erasers in your backpack is considered<br> a what?

bogdanovich [222]

Hoarder of erasers :o

Is this suppose to be a riddle or sum

4 0

3 years ago

The cash drawer of the market contains $227. There are six more $5 bills than $10 bills. The number of $1 bills is two more than

k0ka [10]

Answer:

There are 122 one dollar bills, 11 five dollar bills and 5 ten dollar bills.

Step-by-step explanation:

There are bills of one dollar, five dollars and ten dollars on the cash drawer, therefore the sum of all of them multiplied by their respective values must be equal to the total amount of money on the drawer. We will call the number of one dollar bills, five dollar bills and ten dollar bills, respectively "x","y" and "z", therefore we can create the following expression:

$x + 5*y + 10*z = 227$

We know that there are six more 5 dollar bills than 10 dollar bills and that the number of 1 dollar bills is two more than 24 times the number of 10 dollar bills, therefore:

$y = z + 6\\x = 2 + 24*z$

Applying these values on the first equation, we have:

$2 + 24*z + 5*(z + 6) + 10*z = 227\\2 + 24*z + 5*z + 30 + 10*z = 227\\39*z + 32 = 227\\39*z = 227 - 32\\39*z = 195\\z = \frac{195}{39}\\z = 5$

Applying z to the formulas of y and x, we have:

$y = 5 + 6 = 11\\x = 2 + 24*5 = 122$

There are 122 one dollar bills, 11 five dollar bills and 5 ten dollar bills.

4 0

3 years ago

12 7/10 m + 4 6cm + 7m 85 cm

Inessa [10]

That would be 5+6m+7=5m

7 0

3 years ago

Read 2 more answers

Bean plants grow rapidly. A bean plant is 16 inches tall. Tomorrow it will be 24 inches tall, the next day it will be 32 inches

vodka [1.7K]

Every day, it increases by 8 inches. We know that it started at 16 inches.

We can construct an equation with this information.

Equation: 16+8x=h
h=Height
x=Days

Plug in 12 for x:
16+96=h
h=112 inches

Answer: The plant will be 112 inches tall in 12 days.

3 0

3 years ago

I need help to find the rule.

Sonbull [250]

Lololololol. I long since forgot how to do this. rip

3 0

3 years ago

Read 2 more answers