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2 years ago

Evaluate the expression: H - 7 for H = 22

Mathematics

2 answers:

Leviafan [203]2 years ago

8 0

Answer:

Step-by-step explanation:

Since H=22, therefore when you plug in 22 for h in the equation, you get 22-7=15

Orlov [11]2 years ago

7 0

Answer:

Step-by-step explanation:

H - 7

When H = 22, replace H with 22 in the equation.

22 - 7 = 15

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In a primary school the ratio of boys to girls is 6:7

NeTakaya

Answer:

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Step-by-step explanation:

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2 years ago

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solniwko [45]

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3 years ago

How is — 6n + 5 < 11 shown in a graph

anyanavicka [17]

Answer:

Option C

Step-by-step explanation:

Solve the inequality like an equation using inverse operations.

-6n+5<11

-6n+5-5<11-5

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2 years ago

What is the steps and answer to do this question -x-7y=9 -x+9y=-23

Hitman42 [59]

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2 years ago

Two drivers, Alison and Kevin, are participating in a drag race. Beginning from a standing start, they each proceed with a const

Vilka [71]

Answer:

Alison wins against Kevin by 0.93 s

Step-by-step explanation:

Alison covers the last 1/4 of the distance in 3 seconds, at a constant acceleration $a_a$ , we have the following equation of motion

$s/4 = a_at_a^2/2$

where s (m) is the total distance, ta = 3 s is the time

$s = 4a_a3^2/2 = 18a_a$

$a_a = s/18$

Similarly, Kevin overs the last 1/3 of the distance in 4 seconds, at a constant acceleration $a_k$ , we have the following equation of motion:

$s/3 = a_kt_k^2/2$

tk = 4 s is the time

$s = 3a_k4^2/2 = 24a_k$

$a_k = s/24$

Since $a_a = s/18$ we can conclude that $a_a > a_k$ , so Alison would win.

The time it takes for Alison to cover the entire track

$s = a_aT_a^2/2$

$T_a^2 = 2s/a_a = 2s/(s/18) = 36$

$T_a = \sqrt{36} = 6 s$

The time it takes for Kevin to cover the entire track

$s = a_kT_k^2/2$

$T_k^2 = 2s/a_k = 2s/(s/24) = 48$

$T_a = \sqrt{48} = 6.93 s$

So Alison wins against Kevin by 6.93 - 6 = 0.93 s

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2 years ago