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hoa [83]
3 years ago
11

Hi can you please help me with my work

Mathematics
1 answer:
xenn [34]3 years ago
4 0
A, D, and E are true

One X on the line plot marks one time something happened. So the two x’s above the 1 means that he practiced piano for one hour (see to the right that says hours next to the numbers, so 1=1 hour) two times.

45 minutes is 3/4 of an hour, and is the mark right between 1/2 and 1. There is one x above this mark, so that means Thaddeus practiced for 45 minutes one time, so B is false

Thadeus practiced piano for 30 minutes two times, so C is false because he didn’t mostly practice for thirty minutes.

D is correct because there are 2 Xs above the 0, which means two times he practiced for zero hours, which means he didn’t practice at all.

E is correct because 15 minutes is 1/4 of an hour, so it is the mark between 0 and 1/2. We see there are three x’s there, so that means he practiced for 15 minutes 3 times.

I hope this helps! Let me know if you want me to explain it differently.
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inna [77]
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7 0
3 years ago
the length of a rectangle is 3cm less than its width. The perimeter is 54 cm. What are the dimensions of the rectangle
solong [7]

Answer:

The dimensions of the rectangle:

length: 12cm

width: 15 cm

Step-by-step explanation:

The perimeter of a rectangle is:

perimeter = 2(length+width)

54 = 2(a+b)

a = b - 3

a = legth

b = width

then:

54 = 2((b-3)+b)

54/2 = b-3 + b

27 = 2b - 3

27 + 3 = 2b

30 = 2b

b = 30/2

b = 15

a = b-3

a = 15 - 3

a = 12

Check:

54 = 2(15+12)

54 = 2*27

4 0
3 years ago
What is (-5) the 2 is an exponent just so you know
ValentinkaMS [17]

Answer:

25

Step-by-step explanation:

(-5)^2

(-5)*(-5)

25

7 0
3 years ago
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seraphim [82]

Answer:

Step-by-step explanation:

1. x - 2 = 10

x = 10 + 2 = 12

2. 40 = 5x

40/5 = x

x = 8

3. x/2 = 8

Multiply by 2 on both sides

x = 16

4. x + 14 = 24

x = 24 - 14 = 10

5. x + 2 = 10

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6. x/8 = 1

Multiply by 8 on both sides

x = 8

No 2 5 and 6 is the correct answer

3 0
3 years ago
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Sergeu [11.5K]

Answer:

x < 22

Step-by-step explanation:

X - 8 < 14

Add x to each side

X - 8+8 < 14+8

x < 22

3 0
3 years ago
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