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3 years ago

15

can someone help me solve this problem? A model is made of an airplane. The airplane is 48 feet long and the model is 36 inches

long. What is the ratio of the length of the model to the length of the actual airplane?

1 answer:

Wewaii [24]3 years ago

4 0

36 inches = 3 feet ( 36/12 = 3)

3/48 = 1/16 ratio

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Based on the graph, what was the average speed, in miles per minute, of the train during the interval of 30 to 40 minutes?

Olegator [25]

Answer: 35 miles

Step-by-step explanation:

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3 years ago

Graph the function f(x) = (x + 1)(x - 5). Use the drop-

hodyreva [135]

Answer:

3) (2,-9)

4) (0,-5)

5) (1,-8)

Step-by-step explanation:

3)

The vertex will occur between you x-intercepts.

You already found that happens at x=2.

To find the corresponding y-coordinate, replace x in

f(x)=(x+1)(x-5) with 2:

f(2)=(2+1)(2-5)

f(2)=(3)(-3)

f(2)=-9

So the vertex is (2,-9).

4)

The y-intercept is when x=0.

So in f(x)=(x+1)(x-5) replace x with 0:

f(0)=(0+1)(0-5)

f(0)=(1)(-5)

f(0)=-5

So the y-intercept is (0,-5).

5)

To find another point just plug in anything besides any x already used.

We preferably want to use a value of x that will keep us on their grid however far up,down,left, or right their grid goes out. So I'm going to choose something close to the vertex which is at x=2. Let's go with x=1.

So replace x in f(x)=(x+1)(x-5) with x=1:

f(1)=(1+1)(1-5)

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7 0

3 years ago

Can someone explain and answer please??

Nat2105 [25]

Simplify the ration expression
$\frac{3x-6}{x-2}$

start by seeing if anything in the numerator or denominator can be factored,
you should notice that you can factor out a 3 from 3x-6 in the numerator

when you do so, the result is
$\frac{3 *(x-2)}{x-2}$

now, since there is an x-2 in the numerator and denominator, they "cancel" out since

$\frac{x-2}{x-2} =1$
however, only when $x \neq 2$
since $\frac{0}{0} \neq 1$

when you cancel out the x-2, you're left with 3

hence, your answer is C

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3 years ago

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avanturin [10]

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2x ^4 −3x−4x ^2 +10x−4

2x ^4 +(−3x+10x)−4x ^2 −4

2x ^4 +7x−4x ^2 −4

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3 years ago

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shusha [124]

Answer:

there are 3.3399 moles in 318 grams! ✔️

Step-by-step explanation:

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3 years ago