3 years ago

The sum of 30 and twice a number is 48. Find the number?

Mathematics

1 answer:

lesya [120]3 years ago

3 0

Answer:

9 is the number

Step-by-step explanation:

Let's call this number x

The equation is:

30+2x=48

subtract 30 from both sides and you get

2x=18

divide 2 from both sides and you get

x=9

Therefore, 30+2(9)=48

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How many integers between 100 and 400 contain the digit 2?

Semenov [28]

102, 112, 120-129, 132, 142, 152, 162, 172, 182, 192, 200-299, 302, 312, 320-329, 332, 342, 352, 362, 372, 382, 392
2+10+7+100+2+10+7
138 integers.

8 0

3 years ago

A field is a rectangle with a perimeter of 1260 feet. The length is 100 feet more than width. Find the width and length of the r

lyudmila [28]

To solve this problem you must apply the proccedure shown below:

1. The formula for calculate the perimeter of a rectangle is:

$P=2L+2W$

Where $L$ is the length and $W$ is the width.

2. The length is $100ft$ more than the width, therefore:

$L=W+100$

3. Substitute values into the formula for calculate the perimeter and solve for the width:

$1260=2(W+100)+2W\\ W=265ft$

3. Then, the length is:

$L=265ft+100ft\\ L=365ft$

The answer is: The length is $365ft$ and the width is $265ft$

5 0

3 years ago

Round 9254 to the nearest hundred

Ira Lisetskai [31]

The answer is going to be 9300.

3 0

3 years ago

Read 2 more answers

3. Alyssa has to make 70 pancakes, how many cups of flour will she have to use?

Sonbull [250]

Answer:

14 cups

Step-by-step explanation:

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3 years ago

To buy a car, Devin puts in a down payment of $2000 and pays $300 per month in installments. Write an equation describing this p

padilas [110]

Answer:

He has paid 5600 by the end of the year

your equation is: y=300x+2000

Step-by-step explanation:

x=12 because there is 12 months in a year

y=300(12)+2000

y=3600+2000

y=5600

3 0

3 years ago