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madam [21]
3 years ago
7

Work out the value of: 3x + 2y when x equals -3 and y equals -4

Mathematics
1 answer:
Mazyrski [523]3 years ago
6 0

replace the numbers given for x & y so

the equation becomes 3*(-3) + 2*(-4) =

3*-3 = -9

2*-4 = -8

-9 + -8 = -17

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A bicycle is traveling at 20 miles per hour.
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Answer:

<h2>1613.3 feet </h2>

Step-by-step explanation:

Given the conversion 1mile = 5280feet

If a bicycle is traveling at 20 miles per hour, then the bicycke must have been travelling at (20*5280)feet per hour which is equivalent to 105,600 feet per hour.

To know the number of feet that will be covered in 55seconds, we will solve the equality operation;

If 105,600 feet  = 1hour (3600secs)

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Cross multiply

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3600x = 5,808,000

divide both sides by 3600

3600x/3600 = 5,808,000/3600

x = 1613.3 feet (to the nearest tenth)

<em>Hence the amount of feet covered in 55seconds to the nearest tenth is 1613.3 feet </em>

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4 years ago
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Step-by-step explanation:

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