3 years ago

Help it’s confusing

Mathematics

2 answers:

noname [10]3 years ago

8 0

Answer:

I think is C like I said not quite sure...

zimovet [89]3 years ago

3 0

a) Let a be the number of stories Anna wrote in fifth grade

b) a - 8

c) a - 8

10 - 8

2 stories

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Simplify 1/2b^- 3 please help

11Alexandr11 [23.1K]

$
 \frac{3b^{2}}{4} 
$

5 0

3 years ago

The perimeter of a rectangle is 156 feet the length is 22 feet what is the width

dusya [7]

Answer:

W value 56 ft

Step-by-step explanation:

The formula for the perimeter of a rectangle is

P = 2L + 2W

Here P = 156 ft = 2(22 ft) + 2W, or

78 ft = 22 ft + W

This yields the W value 56 ft

8 0

3 years ago

Mary wants to find an expression she can use to determine how far she has traveled. She knows that her distance is represented b

Ivahew [28]

Answer: this one is confusing

Step-by-step explanation:

3 0

2 years ago

A ball is thrown vertically upward. After t seconds, its height h (in feet) is given by the function h(t)=72t-16t^2. What is the

irakobra [83]

Answer:

The maximum height that the ball will reach is 81 ft

Step-by-step explanation:

Note that the tray of the ball is given by the equation of a parabola of negative main coefficient. Then, the maximum value for a parabola is at its vertex.

For an equation of the form

$at ^ 2 + bt + c$

the t coordinate of the vertice is:

$t =-\frac{b}{2a}$

In this case the equation is:

$h(t)=72t-16t^2$

$a=-16\\b=72\\c=0$

Therefore

$t =-\frac{72}{2(-16)}$

$t=2.25\ s$

Finally the maximum height that the ball will reach is

$h(2.25)=72(2.25)-16(2.25)^2$

$h=81\ ft$

8 0

3 years ago

A fruitshake costs R2,00 more than a chocolate milkshake. If 3 fruitshakes and 5 chocolate milkshakes cost R78,00, determine the

kvv77 [185]

Step-by-step explanation:

Let F represent fruitshake and C chocolate milkshake

one fruitshake cost more 2R more than chocolate shake and

3F + 5C = R78,00

Then (78 - 6) ÷ 8 = 9

a fruitshake costs R11,00 and chocolate milkshake costs 9R,00

3 0

3 years ago

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