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N76 [4]
3 years ago
14

The combined age of john and mary is 20 years. in 2 years, john will be five times as old as mary. how old is john at this time?

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
5 0

I don't know


I hate math

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Pls help me!! I just need help on both of the following questions, a-d on each
Ymorist [56]
I'll do a and e on the first one to show you how to do it

Then See if you can do the rest

a. 6(-3)<span><span>
</span></span>
When your multiplying or dividing with negative numbers; If one of your numbers is negative like the one above, your answer will be negative

So 6 × 3 = 18 ; but since there is a negative on the 3 your answer will be -18

e. -20 ÷ 5

same for this; 20 ÷ 5 = 4, but since the 20 is negative the answer will be <span>-4

You do b, c, d, and f on the first question. Tell me what you get and we'll go from there

</span>Now for the second question <span>

</span>I will do a and d to show you how to do this then you do the rest<span> (I'm inserting a picture with these)

</span>a. 4(-2 \frac{1}{3}) + 7 \frac{1}{6}
First go ahead and turn the fractions into improper fractions, this makes them a bit easier to work with. When multiplying fractions; they do not need a common denominator, all you do is multiply top by top and bottom by bottom.<span>
However, when you add and subtract fractions you MUST have a common denominator

</span>d. (-4.25)(2) + (-4.25)(-2)
remember from the first problem a negative times a positive gives you a negative<span>

but when you times a negative by a negative you get a positive


Now you try b and c; let me know what you get, and we'll go from there!

</span>

7 0
3 years ago
Please help. Find the value of x in the triangle shown below.<br> 5<br> 8
Levart [38]

Answer:

x=+-\sqrt{89}

Step-by-step explanation:

x^{2}=8^{2} + 5^{2}

x^{2}=64+25

x^{2}=89  

x=+-\sqrt{89}

4 0
3 years ago
In how many different ways can you make exactly 0.75 using only nickles dimes and quarters if you have at least one of each coin
harina [27]
18 different ways to make $75
4 0
3 years ago
demarco wrote two correct variable expressions to represent the phrase “the product of a number and 7”. which variable expressio
Norma-Jean [14]
The question is asking to choose among the following choices that states the expressions that could be represented in the said phrase and in my further understanding, I would say that the answer would be n.7, I hope you are satisfied with my answer and feel free to ask for more 
3 0
3 years ago
Read 2 more answers
How many cubic centimeters of water can this paper cone cup hold?
RUDIKE [14]
By definition, the volume of a cone is given by:
 V = (1/3) * (pi) * (r ^ 2) * (h)
 Where,
 r: cone radius
 h: height of the cone
 Substituting values:
 V = (1/3) * (3.14) * ((8/2) ^ 2) * (9)
 V = 150.72 cm ^ 3

 Answer:
 this paper cone cup can hold:
 
V = 150.72 cm ^ 3
8 0
4 years ago
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