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JulsSmile [24]
3 years ago
6

3. A drinking straw of length 21 cm is cut into 3 pieces. The length of the first piece is x cm.

Mathematics
1 answer:
tester [92]3 years ago
8 0

Answer:

I'll setup the problem and you can do the calculations

Step-by-step explanation:

Total length of straw - L

Length of piece 1 - x

Length of piece 2 - y

Length of piece 3 - z

What's given and the answer to (i)

y = x - 3

z = 2x

(ii) L = x + y + z = x + x - 3 + 2x

L = 4x-3

(iii) x = (21+3)/4 = 24/4

leaving you to calculate x

then substitute x into expressions for y & z above and you will have the answer

comment if you have questions

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Please help! It would mean a lot and thanks! :)
notsponge [240]

To add 1/2 and 5/12, make both fractions have the same denominator:

1/2 is the same as 6/12, so 6/12+5/12=11/12

Thus, B is right.

7 0
3 years ago
Nina graphs the function y=⌊x⌋ to learn the properties of the parent floor function.
BabaBlast [244]

Answer:

  5

Step-by-step explanation:

For positive numbers, the floor function y = ⌊x⌋ gives the integer portion of the number.

  ⌊5.7⌋ = 5

5 0
3 years ago
Use a number line to order the numbers from least to greatest.<br>39<br>33.6.<br>61​
Kipish [7]

Answer:

33.6, 39, 61. That's without knowing these numbers

8 0
3 years ago
Read 2 more answers
In science class sara needed 8 test tubes for 3 different experiments. The first experiment required 2 test tubes and the other
photoshop1234 [79]

Answer:

as we know Sara need 8 tube in 3 experiment

she will use 2 tube in 1 experiment

now she have 6 tube in other experiments

so the question said to find how many tube were used in both experiment equally so 3,3 test tube were needed for each of the other two experiment

Step-by-step explanation:

total tube=8 (3 experiment)

used =2tube (1 experiment)

remaining=8-2=6

now ,

dividing 6 into 2 equal part

so,=6/2=3

so 3 tube were used in 2nd experiment and 3in 3rd experiment

6 0
3 years ago
Evaluate (-28) + 38 + (-12). EXPLAIN YOUR ANSWER, I KNOW IT’S -2, BUT WHY? How do I get -2? I am asking you to explain how you s
kipiarov [429]

Answer:

If the sign before the no. is same then they will get added and the resultant will have the same sign too.

Since before 28 and 12 , both of them have the negative sign , they will get added and the sign of their resultant will be negative too.

So , -28-12 = -40

Now, if the sign before the no.s are different then there will be subtraction, and the sign before the highest no. will be the sign of the resultant.

So,( -28)+38+(-12)

= -28+38-12

= -40+38

= -2

We know that 40> 38

sign before 40 is negative, therefore, their resultant i.e 2 will also get the negative sign

I hope this helps you...

3 0
3 years ago
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