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3 years ago

Estimate by rounding each number to the nearest ten thousand and then subtract

Mathematics

2 answers:

denis-greek [22]3 years ago

7 0

Answer:

50,000

Step-by-step explanation

80,000 - 30,000 = 50,000

il63 [147K]3 years ago

7 0

80,000-30,000=50,000

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450 mg converted to g

diamong [38]

Answer:

0.45

Step-by-step explanation:

Your Dividing 450 By 1000 So You'll Get 0.45

8 0

3 years ago

Read 2 more answers

Drag each tile to the correct box.<br>Order the expressions from least value to greatest value.<br>

STatiana [176]

Answer:

-2 19/20, 2 3/5. 3.125, 10.35

Step-by-step explanation:

Let's solve each expression:

Solve:

-4.5 x -2.3

Multiply:

-4.5 x -2.3

10.35

Therefore, the simplified expression is 10.35

Solve:

5/-1.6

Divide:

5/-1.6

3.125

Therefore, the simplified expression is 3.125

Solve:

5 6/15 + (-2 4/5)

First, make the denominators of 4/5 equal to 15:

4/5 = ?/15

Multiply both the numerator and denominator by 3:

4 x 3 = 12

5 x 3 = 15

The new fraction is 12/15.

Add:

5 6/15 + (-2 12/15)

2 9/15

Simplify:

2 9/15 = 2 3/5

(divide the numerator and denominator by 3)

Therefore, the simplified expression is 2 and three-fifths.

Solve:

-3 3/10 - (-7/20)

First, make the denominators of 3/10 equal to 20:

3/10 = ?/20

Multiply both the numerator and denominator by 2:

3 x 2 = 6

10 x 3 = 20

The new fraction is 6/20.

Subtract:

-3 6/20 - (-7/20)

-2 19/20

Therefore, the simplified expression is negative 2 and nineteen-twentieths.

Order from least to greatest:

-2 19/20, 2 3/5. 3.125, 10.35

3 0

3 years ago

Select the correct answer.

Julli [10]

Answer:

Step-by-step explanation:

(-4,2) belongs in this direct variation.

Step-by-step explanation:

Let the direct variation relationship is expressed by the equation y = mx ........ (1), where x and y are in direct variation and k is the variation constant.

Now, the point (4,-2) is included in the direct variation relationship, then from equation (1) we get, -2 = 4m

⇒

Therefore, the equation (1) becomes

⇒ x + 2y = 0 ......... (2)

Now, from the given four options only the point (-4,2) satisfies the

4 0

3 years ago

Solve the following 3 × 3 system. Enter the coordinates of the solution below.

Likurg_2 [28]

Answer:

(-1, 0,-3)

Step-by-step explanation:

it's just subsitution for all of these types of problems

4 0

3 years ago

Two employees are wrapping gifts at the mall. Sally has wrapped seven gifts already and is wrapping at a rate of two gift every

Sunny_sXe [5.5K]

Answer:

It will take them 1.5 hours to wrap the same number of gifts.

Step-by-step explanation:

1. The first thing that we should do is set up two equations to represent the number of gifts that they wrap.

a) Sally: y = 2x + 7

b) John: y = x + 10

Here, y represents the total number of gifts wrapped and x is the number of half hours that pass.

So, what we are saying is that:

a) for every half hour that passes, Sally wraps two gifts, and then she also has 7 gifts that she has already wrapped so we add that on.

b) for every half hour that passes, John wraps one gift, and then he also has 10 gifts that he has already wrapped so we add that on.

2. Now that we have our two equations, we need to find when the number of gifts they have wrapped is equal, ie. when the two equations are equal. Thus, when:

2x + 7 = x + 10

x + 7 = 10 (Subtract x from each side)

x = 3 (Subtract 7 from each side)

Now, remember that x represents the number of half hours, so:

3 half hours = 3*0.5 hours = 1.5 hours

Therefor, it takes them 1.5 hours (or 1 hour and 30 minutes) to wrap the same number of gifts.

6 0

3 years ago