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3 years ago

(a) What is the rate of change for each function? Show your work.

Mathematics

1 answer:

ikadub [295]3 years ago

7 0

First. You have to look at what kind of proportionality it is.It is an Inverse Proportion.so you see the rate of change is 2.3

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6x^2 - 5x + 3<br> + 3x^2 + 7x - 8

Airida [17]

Answer: 9x^2 + 2x - 5

Step-by-step explanation:

6x^2 - 5x + 3 + 3x^2 + 7x -8

Like terms are: (6x^2 and 3x^2), (-5x and 7x), and (3 and -8)

6x^2 + 3x^2 = 9x^2

-5x + 7x = 2x

3 + -8 = -5

9x^2 + 2x - 5 is the simplest answer

7 0

4 years ago

The table below shows the proportional relationship between the weight of dog food, in ounces, and the number of bags of dog foo

luda_lava [24]

K = y/x
k = 30/2
k = 15 <=== constant of proportionality

6 0

3 years ago

A car travels 30 1/5 miles in 2/3 of an hour.What is the average speed in miles per hour of the car

slega [8]

The speed of car is 45.3 miles per hour.

Further explanation:

Speed is the rate at which an object changes position with respect to time.

Given

$Distance = 30\frac{1}{5}\ miles\\Time=\frac{2}{3}$

The formula for calculating speed is:

$Speed = \frac{distance}{time}\\= \frac{30\frac{1}{5}}{\frac{2}{3}} \\=\frac{\frac{151}{5}}{\frac{2}{3}} \\=\frac{151}{5}*\frac{3}{2}\\=\frac{453}{10}\\=45.3\ miles\ per\ hour$

The speed of car is 45.3 miles per hour.

Keywords: Speed, distance

Learn more about speed at:

#LearnwithBrainly

8 0

3 years ago

Ben says the angle is an acute angle. Jeff says the angle is less than a straight angle. Explain whether their statements are co

Dahasolnce [82]

Answer:

sometimes, if their average angle is over 45 degrees

never are 2 obtuse angles summing to 180 degrees

always. two 90 degree angles always sum to 180 which is a straight line

7 0

3 years ago

An excursion group of four is to be drawn from among 5 boys and 6 girls.

tresset_1 [31]

Answer:

Because you are recounting people several times. Say for example, let us number those people

{1,2,3,4} for the four girls and {1,2…7} for the boys.

One possible combination by your way is to fix one boy and girl each, say

{1,1} and then choose the remaining people. Let this combination be, for the sake of the example, {1,1,2,2,3}. This is a valid combination.

Now, when you fix another combination of a boy and a girl, say {1,2}, you could get the same combination as before because one the combinations while choosing the three remaining people would be {1,2,3}.

A correct way would be to choose girls and then choose 5− boys for 1≤≤4

So we get ∑4=1(4)(75−)=441

5 0

3 years ago

Read 2 more answers