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3 years ago

Help ASAP, I’ll give brainliest Show work ty

Mathematics

1 answer:

Liula [17]3 years ago

6 0

Step-by-step explanation:

3(6+15)

=3(21)

=63

5[15-(6+1)]

=5(8)

=40

⅓(15)

⅓(6+15)

=⅓(21)

15/6

=2/1/2 or 2.5

2(6)(15-3)

=2(7)

=36

4(⅓+⅓+⅓)

=4(1)

6/15 - 15/6

=36/90 - 225/90

= -189/90

= -21/10

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What was Mike's average rate of descent over his last three hours?

Romashka [77]

Answer:

The average rate of descent over the last 3 hours is 1000 ft/h.

Step-by-step explanation:

Rate of Change

It's usually referred to as to the variation that one magnitude has in reference to another. The reference magnitude can be time t. The rate of change is calculated as the slope of the curve that represents the function.

The image shows the variation of Mike's height above sea level in feet with time in hours. We need to calculate the rate of change in the last three hours (from 7 to 10).

The rate of change can be calculated with the slope of the line, which formula is:

$\displaystyle m=\frac{h_2-h_1}{t_2-t_1}$

Let's pick two points (7,4000) (10,1000):

$\displaystyle m=\frac{1000-4000}{10-7}=\frac{-3000}{3}=-1000$

$m=-1000\ ft/h$

Note the rate of change is negative, which means the height is decreasing.

The average rate of descent over the last 3 hours is 1000 ft/h.

8 0

3 years ago

Fill in the blank with a constant, so that the resulting quadratic expression is the square of a binomial. $\[x^2 + 22x + \under

saw5 [17]

Answer:

$\[x^2 + 22x + 121\]$

Step-by-step explanation:

Given

$\[x^2 + 22x + \underline{~~~~}.\]$

Required

Fill in the gap

Represent the blank with k

$\[x^2 + 22x + k\]$

Solving for k...

To do this, we start by getting the coefficient of x

Coefficient of x = 22

Divide the coefficient by 2

$Result = 22/2$

$Result = 11$

Take the square of this result, to give k

$k= 11^2$

$k= 121$

Substitute 121 for k

$\[x^2 + 22x + 121\]$

The expression can be factorized as follows;

$x^2 + 11x + 11x + 121$

$x(x + 11)+11(x+11)$

$(x+11)(x+11)$

$(x+11)^2$

Hence, the quadratic expression is $\[x^2 + 22x + 121\]$

8 0

3 years ago

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Serhud [2]

Answer:

706.5 ft^2

Step-by-step explanation:

area = radius^2 (Pi)

15^2(3.14) = 706.5

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3 years ago

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a_sh-v [17]

the answer of the question is c 6

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3 years ago

3/13 as a decmal ronded to the nearest hundeth

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Simple...

you have: $\frac{3}{13}$

Dividing-->>

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But, remember, you're rounding to the nearest hundreth...

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3 years ago