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3 years ago

A. 4.5 B. 10 C. 5 D. None of the above ??

Mathematics

1 answer:

prohojiy [21]3 years ago

8 0

Set up a ratio:

12/24 = x/9

Cross multiply:

24x = 108

Divide both sides by 24:

X = 4.5

The answer is 4.5

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Jordan enters 3.4×6.8 into his calculator he writes the digit 2312 from the display and forgets the decimal point where should J

Natasha_Volkova [10]

Answer:

23.12

Step-by-step explanation:

When you multiply by the two decimals count how many places(numbers) are behind each decimal for a number and add for both of them

For Example

3.4-> There is one place (Number) behind the decimal.

x 6.8 -> there is one place(Number) behind the decimal add how many numbers behind the decimal from both numbers 23.12-> since there are 2 Numbers/ places behind the decimal in the numbers multiplied you move the decimal 2 places / Numbers In the product.

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1 year ago

HELP PLEASE I HAVE 10 MINS

Alekssandra [29.7K]

Answer:

I think C

Step-by-step explanation:

3 0

2 years ago

Rachel used 18 centimeters of tape to wrap 6 presents. How much tape will Rachel need in all if she has to wrap 15 presents? Sol

rjkz [21]

Answer:

Rachel would need 45cm of tape to wrap 15 presents.

Step-by-step explanation:

Firstly we need to find how much is required to wrap one presnt: 18÷6=3.3cm of tape is needed to wrap one present.

Secondly to find how many she needs to wrap 15 we sinply multiply 15 by three and get 45.

I hope this helps you in any way.

8 0

3 years ago

Please help I really don’t understand anything at all !

Lesechka [4]

Answer:

see explanation

Step-by-step explanation:

2(3x + 1) = 4(x + 2) ← distribute parenthesis on both sides

6x + 2 = 4x + 8 ( subtract 4x from both sides )

2x + 2 = 8 ( subtract 2 from both sides )

2x = 6 ( divide both sides by 2 )

x = 3

------------------------------------------------------------

6x = 4(x - 3) ← distribute parenthesis

6x = 4x - 12 ( subtract 4x from both sides )

2x = - 12 ( divide both sides by 2 )

x = - 6

-----------------------------------------------------------

2(4x + 7) = 4x + 30 ← distribute parenthesis on left side

8x + 14 = 4x + 30 (subtract 4x from both sides )

4x + 14 = 30 ( subtract 14 from both sides )

4x = 16 ( divide both sides by 4 )

x = 4

---------------------------------------------------------------------

50 = - (y + 22) ← distribute parenthesis by - 1

50 = - y - 22 ( add 22 to both sides )

72 = - y ( multiply both sides by - 1 )

- 72 = y , that is

y = - 72

7 0

3 years ago

Martha is training for a duathlon, which includes biking and running. She knows that yesterday she covered a total distance of o

umka21 [38]

Answer:

Distance: 6x + 15.5y > 55.5

Time: x + y > 4.5

Step-by-step explanation:

We are given that Martha is training for a duathlon and she covered a total distance of over 55.5 miles in more than than 4.5 hours of training.

Also, she runs at a speed of 6 mph and bikes at a rate of 15.5 mph.

We are to write inequalities representing the distance she traveled and the total time she spent training.

Distance: 6x + 15.5y > 55.5

(formula for distance = speed x time so speeds for running and biking are multiplied by their number of hours)

Time: x + y > 4.5

(she trained for more than 4.5 hours, x hours for running and y hours for biking.

4 0

3 years ago