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trapecia [35]
2 years ago
8

A tower made of wooden blocks measures​ 114 feet high. Then a block is added that increases the height of the tower by 8 inches.

Mathematics
1 answer:
Wewaii [24]2 years ago
6 0

Answer:

D. 23 inches

Step-by-step explanation:

1¼ feet = 1.25 × 12 = 15 inches

15 + 8 = 23 inches

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Jim has only dimes and nickels in his coin bank. He has 37 coins with a total value of $2.65.
guajiro [1.7K]

Answer:

21

Step-by-step explanation:

Let x represent the number of dimes and y represent the number of nickels.  The total number of coins is 37; this gives us the equation

x+y = 37

Each dime is worth ten cents, or 0.10, and each nickel is worth five cents, or 0.05.  The total amount of money is given by

0.10x+0.05y = 2.65

This gives us the system

\left \{ {{x+y=37} \atop {0.10x+0.05y=2.65}} \right.

To solve this, we will use substitution.  We will isolate x in the first equation:

x+y=37

Subtract y from each side:

x+y-y = 37-y

x = 37-y

Substitute this into the second equation:

0.10(37-y)+0.05y = 2.65

Using the distributive property,

0.10(37)-0.10(y)+0.05y = 2.65

3.70-0.10y+0.05y = 2.65

Combining like terms,

3.70-0.05y = 2.65

Subtract 3.70 from each side,

3.70-0.05y-3.70 = 2.65-3.70

-0.05y = -1.05

Divide both sides by -0.05:

-0.05y/-0.05 = -1.05/-0.05

y = 21

There were 21 nickels.

4 0
2 years ago
Read 2 more answers
a bag contains 9 marbles: 4 green 3 are red and 2 are blue what is the probability that the first marble is red and the second o
Korolek [52]

Answer:

If the question states that they are not being replaced, then the answer is 1/8

If the question states that they are being replaced, then the answer is 1/9

Step-by-step explanation:

3/9 x 2/8 = 1/8

3/9 x 2/9 = 1/9

3 0
3 years ago
Which of the following transformations preserves congruence?
In-s [12.5K]
The answer is "I" or "I and II".
5 0
2 years ago
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What is 3÷11=<br> A. 11/3<br> B. 3/11<br> C. 3/8<br> D. 8/3
Katen [24]

Answer:

B. 3/11

Step-by-step explanation:

the division symbol: ÷ essentially is the same as /

if you replace ÷ with / its the same thing.

3 0
2 years ago
Read 2 more answers
How you divide 288 by 16
Ratling [72]

Answer:

18

Step-by-step explanation:

16 |‾‾‾288‾‾‾

16 goes into 28 once = 1 (as the tens digit = 10)

28-16=12 (remainder)

128/16 =8

10 + 8 = 18

8 0
2 years ago
Read 2 more answers
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