3 years ago

PLEASE HELP! IMAGE IS ATTACHED! 15 EXTRA POINTS FOR THIS ONE

Mathematics

1 answer:

dalvyx [7]3 years ago

5 0

Step-by-step explanation:

If parallel then the gradient is the same for both AB and CD but if perpendicular then gradient of one is reciprocal and negative of the other

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Round up 395,621 to the nearest ten thousand

jeyben [28]

396,000
because 5 goes up and anything lower than five stays the same

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3 years ago

A road crew can pave 2/5 km in 1 1/2 hours.how many km of road can they pave in 10 hours?

andrey2020 [161]

Answer:

8/3 km

Step-by-step explanation:

we can represent the given information on a table:

Kilometers time (hours)

2/5 ⇔ 1 1/2

and since we want to know how many kilometers (x) will be paved on 10 hours:

Kilometers time (hours)

2/5 ⇔ 1 1/2

x ⇔ 10

The relationship these 3 numbers have can be described by using the <u>rule of three,</u> which is to multiply the cross quantities on the table (2/5 by 10) and then divide by the remaining amount (1 1/2):

x = $\frac{2}{5}*10$ ÷ $1\frac{1}{2}$

x = $\frac{20}{5}$ ÷ $1\frac{1}{2}$

we use $1\frac{1}{2}=\frac{3}{2}$

x = $\frac{20}{5}$ ÷ $\frac{3}{2}$

and we make the division:

x = $\frac{20}{5}$ ÷ $\frac{3}{2}$ = $\frac{20*2}{5*3}=\frac{40}{15}$

we simplify the fraction by dividing the numerator and denominator both by 5, and we get the result:

x = $\frac{8}{3}$

thus, in 10 hours the crew will pave 8/3 km. Which is about 2.66 km.

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(9) There are 18 elephants in a herd. The number of adult elephants is two times the number of young elephants in the herd. How

jekas [21]

12 adult elephants, 6 young elephants = 18 total :)

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Mr Jones. has 18 students.

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Plese can you help for this questiong 887+326-

777dan777 [17]

Answer:

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Step-by-step explanation:

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