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Gelneren [198K]
3 years ago
9

On Saturday, 90 people visited a museum, Tickets to the museum cost

Mathematics
1 answer:
AveGali [126]3 years ago
3 0

Answer:

64 adult tickets were sold

Step-by-step explanation:

Let a = adult tickets sold

c = child tickets sold

a+c = 90  since there were 90 tickets sold

12a+7c = 950  since the amount of money collect is 950

c = 90-a

Substitute this into the second equation

12a +7( 90-a) = 950

Distribute

12a + 630-7a = 950

Combine like terms

5a +630 = 950

Subtract 630 from each side

5a = 950-630

5a = 320

Divide by 5

5a/5 = 320/5

a =64

64 adult tickets were sold

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10x3 tens in unit and standard form
stealth61 [152]
10*3 tens= 30= 300 units
7 0
3 years ago
A group of fitness club members lose a combined total of 28 kg in one week there approximately 2.2 pounds and 1 kg assuming the
Akimi4 [234]

Answer:

  8.8 pounds

Step-by-step explanation:

There are 7 days in a week, so the daily loss was ...

  (28 kg)/(7 days) = 4 kg/day

In pounds, that is about ...

  (4 kg/day)(2.2 lb/kg) = 8.8 lb/day

6 0
3 years ago
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Paladinen [302]
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8 0
3 years ago
Oil leaked from a tank at a rate of r(t) liters per hour. the rate decreased as time passed, and values of the rate at two hour
Galina-37 [17]
The given data is
t, h:            0     2     4     6     8   10
r(t), L/h:   8.6  7.9  6.8  6.4  5.7  5.3

The lower and upper estimates for the total amount that leaked may be computed as the Left and Right Riemann sums.

The shape of the graph of r versus will determine which of the two sums yields an upper or lower sum.
The plot of the graph is shown below.

The Left Riemann sum is
Sl = 2*(8.6+7.9+6.8+6.4+5.7) = 70.8 L

The Right Riemann sum is
Sr = 2*(7.9+6.8+6.4+5.7+5.3) = 64.2 L

Answer:
The lower estimate for oil leakage is 64.2 L
The upper estimate for oil leakage is 70.8 L

4 0
3 years ago
Read 2 more answers
12 pleaseeee and thanksss
Svetlanka [38]

Answer:

Step-by-step explanation:

0.5-8y= 72

7 0
3 years ago
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