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mezya [45]
2 years ago
12

tim drives at an average speed of 80km per hour for 3 hours 45 minutes work out how many kilometres tim drives

Mathematics
1 answer:
krek1111 [17]2 years ago
4 0
Speed  = distance / time
3 hours 45 minutes = 3.75 hours
80 = distance / 3.75

distance = 80 * 3.75  =  300 kms Answer
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Select all of the answers below that are equivalent to T = {Tinkey-Winky, Laa-Laa,
stepan [7]

Answer:

  • {thermometer, fridge, rusty nail, deoderant}
  • {credit card, face wash, tweezers, shovel}
  • {clothes, glass, car, greeting card}

Step-by-step explanation:

The options that will be equivalent to T will have to be the options that have the same Cardinality as T. Cardinality refers to the number of elements in a set and in the set T, there are 4 elements being Tinkey-Winky, Laa-Laa,  Dipsy, Po so the Cardinality is 4.

The equivalent sets would therefore be sets with a cardinality of 4 as well and those are;

  • {thermometer, fridge, rusty nail, deoderant}
  • {credit card, face wash, tweezers, shovel}
  • {clothes, glass, car, greeting card}
3 0
2 years ago
Jordan had the following scores on her math tests last quarter: 96, 89, 79, 85, 87, 94,
Lisa [10]

Answer:

a) 5.5

b) None

Step-by-step explanation:

The given data set is {96,89,79,85,87,94,96,98}

First we must find the mean.

\bar X=\frac{96+89+79+85+87+94+96+98}{8}=\frac{724}{8}=90.5

We now find the absolute value of the distance of each value from the mean.

This is called the absolute deviation

{|96-90.5|,|89-90.5|,|79-90.5|,|85-90.5|,|87-90.5|,|94-90.5|,|96-90.5|,|98-90.5|}

{5.5,1.5,11.5,5.5,3.5,3.5,5.5,7.5}

We now find the mean of the absolute deviations

MAD=\frac{5.5+1.5+11.5+5.5+3.5+3.5+5.5+7.5}{8} =\frac{44}{8} =5.5

The least absolute deviation is 1.5. This is not within one absolute deviation.

Therefore none of the data set is closer than one mean absolute deviation away from  the mean.

5 0
2 years ago
Chang and Carlotta solve this problem in two different ways. You have $50 in your bank account. You make $8 per hour mowing lawn
Tamiku [17]
HELLO,

Your answer is 130-50=80
You would have to make 80 dollars,

So 8 dollars per hour (of course that is below minimum wage that means you need a raise).

Therefore, you need to mow lawns for 10 hours

Thanks for posting your question here on brainly.
Hope this helps you.
Let me know if its correct.
3 0
2 years ago
Read 2 more answers
Which number line represents the solution of 4x - 9 ≥ -21? what would the number line look like ?
Fittoniya [83]

Solve for x:

4x-9 >= -21

Add 9 to both sides:

4x >= -12

Divide both sides by 4:

X >= -3

The number line would have a solid dot on -3 with a line and arrow pointing to the right of -3

5 0
2 years ago
Read 2 more answers
What is the value of x when y=10 in the equation y=4x-2
Viefleur [7K]
Substitute y for 10 in the equation and solve using these steps:
10=4x+2
1) Minus 2 from both sides
8=4x
2) Divide both sides by 4 (the coefficient of x)
2=x
The value of x is 2 and we can check this by substituting it back into the original equation, 10 = (4×2)+2.
3 0
2 years ago
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