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Delicious77 [7]
3 years ago
14

PLEASE HELP DONT ANSWER IF YOU DONT KNOW....

Mathematics
2 answers:
Damm [24]3 years ago
4 0

Answer:

5.7 Round it and you will get that

Alex777 [14]3 years ago
3 0

Answer:

cant see pic

Step-by-step explanation:

reply with what it says :) awnser :

5.7

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Two similar prisms have heights 4 cm and 10cm what is the ratio of their surface areas
Slav-nsk [51]
Let k be the scale factor relating two similar prisms P_{1} and P_{2}, such that for corresponding parts of prisms P_{1} and P_{2} (for heights, in particular) we have k= \frac{height\  of \ P_{1} }{height \ of\  P_{2} }. In our case k= \frac{4}{10} = \frac{2}{5}.
For surfaces area we have \frac{Surface \ area \ of \  P_{1} }{Surface \ area \ of \  P_{2}} = k^{2} =( \frac{2}{5} )^{2}= \frac{4}{25}.
So, the right answer is 4:25 (choice B)



4 0
3 years ago
David is pouring an entire gallon of milk into 12 glasses. What part of a gallon will be in each glass
expeople1 [14]
This question calls for a fraction.  In a fraction, the numerator (top number) is the number of parts, while the denominator (bottom number) is the total number of parts.  One part is one glass of milk, and there are 12 parts total.  So, we get the answer 1/12.

Answer: 1/12
7 0
3 years ago
Read 2 more answers
Antonia incorrectly solves the equation −2(14−54a)=6 . Her work is shown below.
bekas [8.4K]

Answer:

For the yes/no bit:

step 1: no

step 2: no

step 3: yes

step 4: yes

step 5: no

for the final answer bit: a = 2  3/5 (the last option)

Step-by-step explanation:

yes/no bit:

step 1 is wrong because she didn't multiply -\frac{5}{4}a by -2

step 2 is wrong because she subtracted 1/2 instead of adding it

step 3 is correct because 6 - 1/2 = 11/2

step 4 is correct because she correctly multiplied both sides by 4

step 5 is wrong because she added 5 instead of dividing by -5.

for the final answer bit, I've attached an image below with my working out. hope this helps!

6 0
2 years ago
Two communications companies offer calling plans. With Company X, it costs 30¢ to connect and then
tensa zangetsu [6.8K]
<h3>Answer:  n+15</h3>

=======================================================

Explanation:

  • n = number of minutes
  • cost of company X = 3n+30
  • cost of company Y = 2n+15

To find out how much more company X charges, we subtract the two cost expressions

CompanyX - CompanyY = (3n+30)-(2n+15) = 3n+30-2n-15 = n+15 which is the final answer.

--------------

An example:

Let's say you talk on the phone for n = 20 minutes.

Company X would charge you 3n+30 = 3*20+30 = 90 cents

Company Y would charge you 2n+15 = 2*20+15 = 55 cents

The difference of which is 90-55 = 35 cents.

If you plugged n = 20 into the n+15 expression we got, then n+15 = 20+15 = 35 matches up with the previous 35 cents.

This example helps confirm the answer. I'll let you try out other examples.

8 0
2 years ago
Question 1
wlad13 [49]
You can draw vertical line, and get 2 rectangles. 
1) First one with sides 2 and 7.
2) Second one with sides 1 and (5-2) = 3,  1 and 3.

3) Area of the first one =2*7=14 units²
4)Area of the second one = 1*3=3 units²

5) Area of the whole polygon = 14+3=17 units²

Answer C. 17units².

7 0
3 years ago
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