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Eva8 [605]
2 years ago
10

Evaluate the expression 4.02 + 3y for x = 5 and y = 6​

Mathematics
1 answer:
IgorC [24]2 years ago
6 0

the expression looks like its missing the x value tbh...

you provided x and y but the expression doesn't

have an x.

so, that applied, 4.02+3(6)

4.02+3(6)

4.02+18

22.02

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

but.... if you wrote your expression wrong and you meant to write 4.02x+3y,

than:

4.02(5) + 3(6)

20.1+18

= 38.1

__________

So, if you actually meant 4.02 + 3y, ur answer would be 22.02, but if you meant 4.02x+3y, then your answer would be 38.1

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A jar of quarters and dimes contains $20.00. There are 110 coins in all. How many of each are there?
VikaD [51]

Answer:

There are 50 dimes and 110-50 = 60 quarters in the collection.

Step-by-step explanation:

Let D be the number of dimes.

Then the number of quarters is (110-D).

The "value equation" is

10D + 25*(110-D) = 2000.

Simplify and solve for D:

10D + 2750 - 25D = 2000,

-15D = 2000 - 2750,

-15D = -750,

D = %28-750%29%2F%28-15%29 = 50.

6 0
3 years ago
6 more than the difference of b and 5
kirza4 [7]
The answer would be b-5+6
8 0
3 years ago
Multiply (5 + 3i)(5 − 3i) <br><br> 16 + 15i <br><br> 16 − 15i <br><br> 16 <br><br> 34
Annette [7]

Answer:

(5 + 3i)(5 − 3i) = 34

Step-by-step explanation:

The multiplication of two identical binomials who have different symbol, can be solved using the factoring case of a difference of squares:

(a-b).(a+b)=a^{2}-b^{2}

So, in this case:

(5+3i).(5-3i) = 5^{2}-(3i)^{2}

=25-9i^{2}

Remember that i=\sqrt{-1}

So: i^{2}=-1

We replace on the polynomial:

=25-9.(-1) = 25+9=34

3 0
3 years ago
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prisoha [69]
It would be 1/8. 2 to the third is 8, and all three answers correct is one option.
4 0
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Express the distance 48,000,000 meters using scientific notation in meters and then in millimeters
KengaRu [80]

Answer:

Meters:4.8x10 to the 6th power

Millimeters:4.8x 9th power.

Be doin Pearson MathXL

I did 1 today.

8 0
2 years ago
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