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Arturiano [62]
3 years ago
15

Evaluate the expression for r = 2 and t = 7. 3(r2 + t) - r2

Mathematics
1 answer:
padilas [110]3 years ago
5 0
We are asked to evaluate the given expression 3 (r² + t) - r² given that r is equivalent to 2 and t is equivalent to 7. The solution to this problem is shown below:
3 (r² + t) - r² , substitute r=2 and t=7 in the expression
3 (2² + 7) - 2² , perform squared
3 (4+7) -4, perform addition of 4 and 7
3 (11) -4, perform multiplication os 3 and 11
33 - 4, perform subtraction
29

The answer is 29.
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Three months later, Pepe averaged a speed of 4/5 of a mile in 1/10 of an hour, while Paula averaged 5/6 of a mile in 1/12 of an
MAVERICK [17]

Answer:

2 miles per hour

Step-by-step explanation:

We have to calculate the miles per hour of each person

Formula = Distance in miles/ Time in hours

a) For Pepe

Pepe averaged a speed of 4/5 of a mile in 1/10 of an hour

Hence,

= 4/5 miles / 1/10 hour

= 4/5 miles ÷ 1/10 hour

= 4/5 miles × 10/1 hour

= 8 miles per hour

b) For Paula

Paula averaged 5/6 of a mile in 1/12 of an hour.

Hence,

= 5/6 miles / 1/12 hour

= 5/6 miles ÷ 1/12 hour

= 5/6 miles × 12 hour

= 10 miles per hour

Therefore, In miles per hour, the number of miles Paula ran faster than Pepe is calculated as:

10 miles per hour - 8 miles per hour

= 2 miles per hour

3 0
3 years ago
There are 266 basketball fans who plan to go to a game. How many buses will be needed, given that each bus can hold 31 fans? Div
kobusy [5.1K]

Exact answer: 8.5

Rounded Answer: 9

7 0
3 years ago
Gisele trains 7 days per week for a biathlon. She covers a total of 20 miles cycling and running each day. Gisele cycles a total
svp [43]

Answer:

D The solution is 35, which represents the number of miles she runs each week.

Step-by-step explanation:

Given that Gisele trains 7 days a week, the total of miles she cycles and runs in a week can be divided by 7, or multiplied by 1/7 to find her daily average.  Her total number of miles ran for the week combined with her cycling miles multiplied by 1/7 would average 20 miles daily.  Since the run is the same each day, using the equation:

1/7(105 + r) = 20 will give the value of 'r' in the number of miles ran per week

105 + r = 140 (multiply both sides by '7')

r = 35 (subtract '105' from both sides)

7 0
3 years ago
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Change to standard form y=1/3x+6
Serhud [2]

Answer:

the answer is x - 3y = -12

6 0
4 years ago
At a recent boat show, Boater's Paradis sold five more boats than Pelican Marine sold. If together they sold 33 boats, how many
zhannawk [14.2K]
<span>Paradise = 19 Pelican = 14</span>
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3 years ago
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