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Paraphin [41]
3 years ago
12

Can someone please help me with this!!!

Mathematics
1 answer:
Yanka [14]3 years ago
6 0
4mins---->12 cars
6mins---->(6*12/4)=18


4mins---->12
5mins---->(5*12/4)=15


And so on
You might be interested in
Find each missing length, make sure you give both exact AND approximate. Brainliest + 50pts
goldenfox [79]

#1

  • B²=15²-7²
  • B²=225-49
  • B²=176
  • B=13.26(exact)
  • B=13.3(approx)

#2

  • B²=17²-7²
  • B²=289-49
  • B²=240
  • B=15.49(exact)
  • B=15.5

#3

  • H²=20²+14²
  • H²=400+196
  • H²=596
  • H=24.41(approx)
  • H=24.4(exact)

#4

  • B²=6²-3²
  • B²=36-9
  • B²=27
  • B=5.196(exact)
  • B=5.2(approx)
3 0
2 years ago
Find the surface area of the cylinder to the nearest tenth of a square unit. use 3.14 for pi
Alborosie

Given:

  • Height of cylinder is 18.2 cm
  • Radius of cylinder is 3 cm

~

To Find?

  • Surface area

~

Solution:

Using formula:

  • Surface area of cylinder = 2πr (h + r)

~

Substituting values in the formula:

\longrightarrow \sf 2 × 3.14 × 3 (18.2 + 3)

\longrightarrow \sf 6.28 × 3 (21.2)

\longrightarrow \sf 18.84 × 21.2

\longrightarrow \sf 399.4 cm²

~

  • Hence, (B) 399.4 cm² is right answer.
6 0
2 years ago
36 boys complete a school task in 4 hours. How many boys would be required to complete the same task in 2¼ hours?​
vova2212 [387]

Answer:

20

Step-by-step explanation:

If 36 boys can conplete a task in 4 hours, then 19.35 boys could do it in 2 and a fourth hours.

You can set up an equation

A fourth of an hour is 15 minutes, so,

36 is to 4 as x is to 2.15, or,

36=4 as X=2.15

Multiply 2.15 by 36 (77.4)

77.4 divided by 4= 19.35.

Of course, you cannot have 19.35 boys, so there must be 20.

Hope this helps!

8 0
3 years ago
Factor completely 4x^2 + 3x - 10.
spin [16.1K]
4x²+3x-10

= 4x² + 8x -5x - 10
= 4x (x+2) -5(x+2)
= (4x-5) (x+2)

Option C
6 0
3 years ago
Read 2 more answers
What is the following product? 3√2(5√8-7√3)
vovangra [49]

Answer:

3√2(5√8-7√3) = 60 - 21√6

Step-by-step explanation:

We need to find the product of  3√2(5√8-7√3). The distributive property states that: A(B+C) = AB + AC.

Then, by using the distributive propertive we have that:

3√2(5√8-7√3) = 3√2 * 5√8 - 3√2 * 7√3 = 15√8√2 - 21√2√3.

Also, we know that: √A√B = √AB. Using this:

15√8√2 - 21√2√3 = 15√16 - 21√6 = 60 - 21√6.

6 0
3 years ago
Read 2 more answers
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