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4vir4ik [10]
3 years ago
8

Find the value of 7x+3y when x=12 and y=-6​

Mathematics
2 answers:
miv72 [106K]3 years ago
7 0

Answer:

66

Step-by-step explanation:

To get the values we just have to substitute the number of the value

7x + 3y = 7(12) + 3(-6)

84 - 18 = 66

kenny6666 [7]3 years ago
6 0

Answer:

66

Step-by-step explanation:

7 x + 3 = 7 (12) + 3 (-6)

84 - 18 = 66

Substitute the value of the variable into the expression and simplify.

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A motorcyclist travels 98 km in 1 hour 10 minutes.calculate his average speed ,giving your answer in kilometres per hour.
joja [24]

10 minutes is 1/6 of an hour.

1 hour and 10 minutes = 7/6 hours

98 km  / 7/6 = 98 x 6/7 = (98 x 6) /7 = 588/7 = 84 km per hour

3 0
3 years ago
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If represents the number of bacteria in a culture at time t, how many will there be at time
Crazy boy [7]

Answer:

Population of bacteria at  time t = 6 is 2441

Step-by-step explanation:

The complete question is

If y = 10 (2.5)^trepresents the number of bacteria in a culture at time t, how many will there be at time t = 6

Solution

Given

The population of bacteria after time t is equal to y = 10 (2.5)^t

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6 0
3 years ago
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LenaWriter [7]

Answer:

Step-by-step explanation:

A

2x3 is 6x4 is 24+5 is 29

B

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4 0
3 years ago
In a right-angled triangle, the hypotenuse is 113 and a leg is 112.
melomori [17]

Answer: 15

Step-by-step explanation: Use the formula: a^{2}+b^{2}=c^{2}

Remember c^{2} should always be the hypotenuse or the longest side.

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aniked [119]
The equation is
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Ethan had 12 baseballs.
Steps:
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2. You subtract 3
2. You get 11.66 repeating
3. You round up to 12
8 0
3 years ago
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