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2 years ago

I need helpppp..................

Mathematics

1 answer:

Phantasy [73]2 years ago

6 0

Answer:

First: 13

Second: 21.79

Step-by-step explanation:

In the photo

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A copy machine makes 104 copies in 3 minutes and 15 seconds. how many copies does it make per minute

Gnesinka [82]

Answer:

<h2>32 copies</h2>

Step-by-step explanation:

First convert 3 minutes and 15 seconds into minutes by converting 15 sec to min and add it to 3min

60 sec = 1min

15 sec = 15 / 60 × 1 min

= 0.25min

Add it to 3min

3min + 0.25min = 3.25 min

<u>We use ratio and proportion</u>

3.25min = 104 copies

1 min = 104× 1/ 3.25

= 104 / 3.25

= 32

The final answer is 32 copies

Hope this helps you.

4 0

3 years ago

Read 2 more answers

The density of copper is 9.86 g/cm³.<br> work out the mass of the solid copper cuboid in kg.

LenaWriter [7]

Answer:

Thus the mass of copper in solid form is m = 9860 kg

5 0

3 years ago

The second term in a geometric sequence is 20. The fourth term in the same sequence is 11.25. What is the common ratio

damaskus [11]

Let $a_n$ be the n'th term of the sequence.

so $a_1$ is the first term, $a_2$ the second term and so on...

In a geometric sequence with $a_1=c$ , and common ratio r, the terms are as follows:

$a_1=c$
$a_2=cr$
$a_3=c r^{2}$
$a_4=c r^{3}$
.
.
that is, each term is its previous term times the common ratio r.

In our example

$a_2=cr=20$ and $a_4=c r^{3}=11.25$

$\frac{a_2}{a_4}= \frac{cr}{c r^{3}}= \frac{1}{ r^{2}}= \frac{20}{11.25}= 1.778$

so $r^{2} =1/1.778=0.56$

$r= \sqrt{0.56}= 0.75$

Answer: r=0.75

3 0

3 years ago

BEG is a triangle ABC and DEF are parallel lines workout the size of angle x

Ne4ueva [31]

Answer:

Step-by-step explanation:

Here the answer