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statuscvo [17]
3 years ago
12

Carrie spent

Mathematics
1 answer:
prohojiy [21]3 years ago
8 0
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Use mental math to solve the problem 8.02 − 5.98
Zinaida [17]
Round off 8.02 to 8 and 5.98 to 6.  Then subtract:  8 - 6 = 2 (approximately)
4 1
3 years ago
Read 2 more answers
HURRY PLEASE!! 50 POINTS
ICE Princess25 [194]

Answer:

7x² + 5x

Dtep-by-step explanation:

(9x² + 8x) - (2x² + 3x)

9x² + 8x - 2x²- 3x

7x² + 5x

3 0
3 years ago
Preston has a car washing business. Last year he washed 20 cars a week. This year, he washed 1,200 cars. How many more cars did
kakasveta [241]

Answer:

He washed 160 more cars this year than last year.

Step-by-step explanation:

Last year:  He washed a total of 1,040 cars.

This year:  He washed a total of 1,200 cars.

     1,200

 <u>-   1,040</u>

        160

7 0
3 years ago
A 250 ml bottle of water treatment liquid will treat up to 625 litres of water. Given that 1 cubic meter=1000 litres, how much t
kupik [55]
You will need:
(2240/625)*250=896 ml of treatment liquid.
If each bottle contains 250 ml you'll need 3.6 bottles (3 bottles and a bit more than half a bottle).

I do not think you need the conversion 1 cubic meter=1000 litres unless the volume of the tank is in cubic meters BUT 2240 cubic meters seems too large!
5 0
3 years ago
An alloy consists of nickel, zinc, and copper in the ratio 2:7:9.
Alexus [3.1K]

Answer:

0.4kg, 1.4kg and 1.8kg

Step-by-step explanation:

Given parameters:

         Mass of alloy = 3.6kg

         Ratio of elements in the alloy = 2:7:9

Unknown:

Mass of each element in the alloy = ?

Solution:

To find the mass of each element in the alloy, first find the sum of the ratio;

              2+7+9 = 18

Mass of nickel  = \frac{2}{18} x 3.6 = 0.4kg

Mass of zinc = \frac{7}{18} x 3.6 = 1.4kg

Mass of copper = \frac{9}{18} x 3.6 = 1.8kg

The mass of each metal is 0.4kg, 1.4kg and 1.8kg

5 0
3 years ago
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