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8090 [49]
3 years ago
5

The estimate of 6.8×2.3

Mathematics
2 answers:
zhuklara [117]3 years ago
6 0
7 x 2 = 14
6.8 x 2.3 = 15.64
steposvetlana [31]3 years ago
5 0
The estimate is about 15.60
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A rugby team played six games.
Schach [20]

Step-by-step explanation:

mean score means the sum of all 6 scores divided by the number of games : 6.

sum6/6 = 15

sum6 = 15×6 = 90

(sum6 + x)/7 = 16

sum6 + x = 16×7 = 112

90 + x = 112

x = 22

they scored 22 points in the 7th game.

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2 years ago
Expressions equivalent to 81^x
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3 years ago
Of the 20 students on a field trip, 11 brought lunch from home. What percent of students brought lunch?? From home? *
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3 years ago
That is my question
Margarita [4]

Answer:

His total profit is $213.00

Step-by-step explanation:

He spent $90 on tires ($45x2), $255 on rims ($85x3), and $25 on headlights ($5x5), spending a total of $370.

He sold the tires for a total of $130 ($65x2), the rims for a total of $378 ($126x3), and the headlights for a total of $75 (15x5), a total of $583.  

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3 0
3 years ago
At first, the ratio of Dave's savings to Sam's savings was 5:4. After each of them donated $40 to charity, the ratio of Dave's s
mars1129 [50]

Answer:

$300  

Step-by-step explanation:

Let D = Dave's savings and S = Sam's savings.

(1)                     D/S = 5/4

(2) (D – 40)/(S-40) = 13/10                  Multiply (1) by 4S

(3)                     4D = 5S                      Multiply (2) by 10(S-40)

            10(D - 40) = 13(S - 40)            Remove parentheses

(4)       10D – 400 = 13S - 520            Solve (3) for S

                         S = (4/5)D                  Substitute into (4)

         10D – 400 = 13(4/5)D - 520     Multiply each side by 5

     50D – 2000 = 52D – 2600         Subtract 50D from each side

               -2000 = 2D – 2600            Add 2600 to each side

                  600 = 2D                          Divide each side by 2

                      D = $300

Dave's savings at first were $300.

3 0
3 years ago
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