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3 years ago

PLS HELP ME ASAP GUYS FOR 1, 2, and 3 PLS (SHOW WORK!!) + LOTS OF POINTS!

Mathematics

1 answer:

pantera1 [17]3 years ago

8 0

1. B forms a proportion, this is what I did, i simply 10/18 to 5/9 and i try to see if 5/9 is equivalent to 25/45 and it is. 5/9*5/5= 25/45

2. You multiply 27*4=108 then 108/12=9 so a=12

3. you multiply 16*21=336 then 336/12=28 so b=28

Hope this helps!

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In how many ways can you park 4 different cars at a car park with 5 different parking spaces?

meriva

1. If you have 1 first then... 1,2,3,4 - 1,3,2,4 - 1,2,4,3 - 1,3,4,2 - 1,4,3,2 - 1,4,2,3
2. If you have 2 first the.... 2,1,3,4,- 2,1,4,3 - 2,3,1,4 - 2,3,4,1 - 2,4,3,1- 2,4,1,3
3. And so one with 3,4
Hope this helps:)

5 0

3 years ago

Consider the function f ( x ) = − 2 x 3 + 27 x 2 − 108 x + 9 . For this function there are three important open intervals: ( − [

Darya [45]

Answer:

Step-by-step explanation:

<u>Increasing and Decreasing Intervals of Functions</u>

Given f(x) as a real function and f'(x) its first derivative.

If f'(a)>0 the function is increasing in x=a

If f'(a)<0 the function is decreasing in x=a

If f'(a)=0 the function has a critical point in x=a

As we can see, the critical points may define open intervals where the function has different behaviors.

We have

$f ( x ) = - 2 x^3 + 27 x^2 - 108 x + 9$

Computing the first derivative:

$f' ( x ) = - 6 x^3 + 54 x - 108$

We find the critical points equating f'(x) to zero

$- 6 x^3 + 54 x - 108=0$

Simplifying by -6

$x^2 -9 x +18=0$

We get the critical points

$x=3,\ x=6$

They define the following intervals

$(-\infty,3),\ (3,6),\ (6,+\infty)$

Thus A=3 and B=6

3 0

3 years ago

A recipe uses 3/4 cup of water and 2 cups of flour. Write the ratio of water to flour as described by the recipe

Mademuasel [1]

Answer: 3/4 : 8/4

Step-by-step explanation:

flour = 2 = 2/1 = 4/2 = 8/4

make the denominators the same and you are good

5 0

2 years ago

Read 2 more answers

To check the correctness of the answer to a multiplication example, divide the

zubka84 [21]

Multiplicand is the number that gets multiplied, multiplier is the number that you are multiplying by, product is the result of mulptiplication multiplicand by multiplier.

Let a be a multiplicand, b be a multiplier and c be a product, then

a·b=c.

To check the correctness of the answer to a multiplication example, you should divide the product c by the multiplier b:

c÷b=a.

Answer: correct choice is A.

5 0

3 years ago

Read 2 more answers

5 peas equals 1 pod. 4 pods equals 1/2 ping. 3 pings equals how many peas? Please give me the full explanation so I can know for

salantis [7]

Answer:

120 peas in 3 pings

Step-by-step explanation:

(5x8)3

5 0

4 years ago