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Kisachek [45]
3 years ago
13

Use rounding or compatible numbers to estimate 222 plus 203

Mathematics
1 answer:
Vesnalui [34]3 years ago
6 0
200 can be rounded down to 200, which is easy to add with.  Thus, an estimate is 222+200=422.

Alternatively, you could round 222 up a bit, to get 225+200=425.  This is actually the correct answer, but this rounding doesn't make the calculation easier, so if you needed a quick estimate I'd go with the first option.
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Jessica's age plus Mike's age is 20. Mike is 4 years younger than Jessica. How old is Mike?
sergiy2304 [10]

Answer:

5

Step-by-step explanation:

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2 years ago
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olchik [2.2K]
Make denomenators the same

times left denomenator by (x+3)/(x+3) and right one by (x-9)/(x-9)

\frac{3(x+3)}{(x-9)(x+3)}+  \frac{5(x-9)}{(x-9)(x+3)}=
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4 0
3 years ago
The federal government spends $25.2 million each year to operate parks and historic sites in Washington D.C. This is $7.8 millio
Ray Of Light [21]

Answer:

y + 7.8 = 25.2

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Step-by-step explanation:

y + 7.8 = 25.2

(now we solve the equation .... we substract 7.8 from each side of the equation )

y = 25.2 - 7.8

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3 years ago
Keith is using photo software to enlarge a photograph that is 4 inches by 6 inches to 9 inches by 13.5 inches. What is the scale
Slav-nsk [51]

Answer:

2.25

Step-by-step explanation:

The old width of 4 inches became a new width of 9 inches.

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New 9 in.

The old length of 6 inches became a new length of 13.5 inches.

Divide the new size by the corresponding old size.

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You see in both cases, the scale factor is 2.25

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3 years ago
11) If A = {19, 20, 21, 24} and B = {17, 19, 20, 22), list the elements of A U B.
Elodia [21]

Answer:

A U B = {17, 19, 20, 21, 22, 24}

Step-by-step explanation:

The symbol U is the union symbol, which denotes the union of two sets.

This means that given two sets A and B, the expression

A U B

indicates all the elements that belong to either set A or set B.

In this problem, we have the following two sets:

A = {19, 20, 21, 24}

B = {17, 19, 20, 22}

We can therefore list all the elements belonging to either set A or set B, they are:

17, 19, 20, 21, 22, 24

So, the expression A U B indicates the set:

A U B = {17, 19, 20, 21, 22, 24}

3 0
2 years ago
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