2 years ago

Miss watson runs a disatnce of 200 metres in 25 seconds.

Mathematics

1 answer:

iogann1982 [59]2 years ago

8 0

Answer:

Step-by-step explanation:

ANSWER:

average = total distance / time

average = 200/25 = 8 m /s

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Robert's father is 4 years older than 3 times Robert's age. His father is 40 years old. Write the equation used to determine Rob

FrozenT [24]

Answer:

robert is 12 years old

Step-by-step explanation:

robert's age=x

40=3x+4

that's the equation

40=3x+4

=36=3x

x=12

8 0

3 years ago

For the vectors Bold uequalsleft angle negative 8 comma 0 comma 1 right angleand Bold vequalsleft angle 1 comma 3 comma negative

trapecia [35]

Answer:

Step-by-step explanation:

Given that there are two vectors U = (-8,0,1)

V = (1,3,-3)

To find projection of u on V and also projection of V on U

First let us find the dot product U and V

U.V = $-8(1)+0(3)+1(-3)\\= -11$

Projection of U on V = $\frac{U.V}{|V|} \\=\frac{-11}{\sqrt{1+9+9} } \\=\frac{-11}{\sqrt{19} }$

Similarly projection of V on U

= $\frac{U.V}{|U|} \\=\frac{-11}{\sqrt{64+0+1} } \\=\frac{-11}{\sqrt{65} }$

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3 years ago

the length of a rectangular yard is 50ft and it's perimeter is less than 170ft. Describe the width of the yard.

Rufina [12.5K]

The width of yard is 120 ft

4 0

2 years ago

How many Children attended the classroom if there were 11 girls who made up 44% of the children?

WITCHER [35]

Answer:

Step-by-step explanation:

If 11 equals 44%, then x equals 100%.

x = $\frac{100}{44}$ * 11

11 * 100 = 1100

1100/44 = 25

So, your answer is 25.

3 0

3 years ago

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2.1e-10 in standard form?

just olya [345]

<span>2.1e-10
= 2.1 x 10^-10
= 0.00000000021

hope it helps</span>

5 0

3 years ago

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