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Sav [38]
3 years ago
11

Seven students cut 5 3/4 inches of thread from a spool for a school project. What number represents the change in the amount of

the thread on the spool?
A.) -40 1/4
B.) -35 3/4
C.) -29 3/4
D.) -26 1/4
Mathematics
2 answers:
Andrej [43]3 years ago
4 0
I think the answer is b???
yaroslaw [1]3 years ago
3 0

Answer:

\implies \text{Required Number = }-40\tfrac{1}{4}

Step-by-step explanation:

\text{Part of the thread which is being cut from a spool = }5\tfrac{3}{4}\\\\=\frac{23}{4}

Number of students in the school project = 7

So, total part which is cut from the thread on the spool = Number of students × Part of the thread cut by one student

\text{Total part = }7\times \frac{23}{4}\\\\=\frac{161}{4}\\\\=40\tfrac{1}{4}

But, we are asked to tell a number which represents the change in the amount of the thread on the spool.

⇒ Required Number = Inverse of the total part which is cut

\implies \text{Required Number = }-40\tfrac{1}{4}

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Alex_Xolod [135]

Answer:

  1. Define your variable and write your equation:  36 + b + (3b-28) = 180°.
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Step-by-step explanation:

a = 36

c = 3b - 28

a + b + c = 180°

a = measure of the first angle

b = measure of the second angle

c = measure of the third angle

then:

1)  36 + b + (3b-28) = 180   ⇒ )Define your variable. Write your equation and solve)

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3) c = 101°      ⇒   measure of the third angle

Check:

36° + 43° + 101° = 180°

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