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3 years ago

Substitute each variable to determine whether the inequality is true or false.

Mathematics

2 answers:

lyudmila [28]3 years ago

6 0

Answer: true

Step-by-step explanation:

First you substitute 15 into the problem and add 12 which equals 27 and 27 is bigger than 20 therefore your problem is true.

ioda3 years ago

3 0

True because 15 plus 12 is 27 and that is greater than 20

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Two trains leave the station at the same time going in opposite directions. one of the trains travels at 90 mph and the other is

Leokris [45]

Answer: 6.125 hour

Explanation:

Train 1 ===> 1 hour = 90 miles
Train 2 ===> 1 hour = 120 miles

1 hour = 90 + 120 = 210 miles apart

210 miles = 1 hour
735 miles = 735 ÷ 210 = 6.125 hours

8 0

3 years ago

Read 2 more answers

Work out the value of x.

lesya [120]

Answer:

x = 20

Step-by-step explanation:

2x + 7x = 180

9x = 180

x = 20

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3 years ago

A pump can fill a 750 gallon tank in 35 minutes.how long will it take to fill 1200 gallons

Veseljchak [2.6K]

Answer:

56 minutes

Step-by-step explanation:

use ratio to solve for x,

750 gal 1200 gal

______ = __________

35 min x

$\frac{750}{35}$ = $\frac{1200}{x}$

solve for x = (1200 * 34 )/750 = 56 min

7 0

3 years ago

Put 21 boxes into sets of 3 how many sets did you make. plzzz help me thank u

natta225 [31]

21/3 = 7
Division problem
You made 7 sets

7 0

3 years ago

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Line segment AB is one unit long. If point C cuts AB so that AC = 0.618, what is the ratio of AC to CB? a. 1 c. 1.32 b. 1.618 d.

Alecsey [184]

By the segment addition postulate,
AB = AC+CB
since C is somewhere between A and B

We know AC is 0.618 and AB = 1
CB = x for now

AB = AC+CB
1 = 0.618+x
1-0.618 = 0.618+x-0.618 ... subtract 0.618 from both sides
0.382 = x
x = 0.382

So CB is 0.382 units long

To find the ratio of AC to CB, divide the values
AC/CB = 0.618/0.382 = 1.618 (approximate to 3 decimal places)

Answer: Choice B) 1.618

7 0

3 years ago