All categories

3 years ago

Subtract (2x3 + 9x - 8) - (4x2 - 15x + 7).

Mathematics

1 answer:

maxonik [38]3 years ago

4 0

2x3 + 24x - 4x2 - 15

You might be interested in

Find all x-intercepts of the function. Express your answer as a list of x-values.

-Dominant- [34]

Answer:

all x intercepts [-4, 0] [4, 0]

Step-by-step explanation:

x-intercept, i.e. y=0

f(x) = x^3 - 4x^2 - 16x + 64 = 0

(x^3 + 4^3) - 4x^2 - 16x = 0 [FYI, x^3 + y^3 = (x + y)(x^2 - xy + y^2)]

(x + 4)(x^2 - 4x + 16) - 4x^2 - 16x = 0

(x + 4)(x^2 - 4x + 16) - 4x(x + 4) = 0

(x + 4)(x^2 - 4x + 16 - 4x) = 0

(x + 4)(x^2 - 8x + 16) = 0

(x + 4)(x - 4)^2 = 0

x = -4 or 4

all x intercepts [-4, 0] [4, 0]

4 0

1 year ago

Read 2 more answers

Use distributive property to rewrite problem so it had only two factors. Then solve (25x9)+(75x9)=

Shalnov [3]

ANSWER

$(25\times9)+(75\times9)=9(25+75)$

$(25\times9)+(75\times9)=9(100)$

$(25\times9)+(75\times9)=900$

EXPLANATION

According to the distributive property,

$(a\times b)+(a\times c)=a(b+c)$

This implies that,

$(25\times9)+(75\times9)=9(25+75)$

$(25\times9)+(75\times9)=9(100)$

The Right Hand Side of the equation now has 2 factors.

We solve now to obtain;

$(25\times9)+(75\times9)=900$

4 0

3 years ago

katie has red 32% of a book if she has to read 80 pages how many more pages does Katie have left to read

galben [10]

In this question, the information that Katie has already read 32% of a book that has a total of 80 pages is of great importance. This information is enough to find the required answer to the question.
Total number of pages Katie has to read = 80
Percentage of pages that Cathie read = 32%
Number of pages that Katie read = (32/100) * 80
   = 256/10
   = 25.6 pages
Then
The number of pages that Katie have left to read = 80 - 25.6
   = 54.4 pages
So Katie has 54.4 pages left to read.

5 0

3 years ago

The mean age of 6 women in an office is 25 years old.

tresset_1 [31]

Answer:

their marriage and 2 years before

5 0

2 years ago

If you flip a fair coin 7 times, what is the probability that you will get exactly 4 tails?

andre [41]

Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Step-by-step explanation:

We need to find the probability that you will get exactly 4 tails, if you flip a fair coin 7 times.

This is the combination question.

The total combinations will be: 2^7=128

Now, finding number of ways we can get exactly 4 tiles:

We will use the formula:

$^nC_k=\frac{n!}{k!(n-k)!}$

in our given question, n= 7, k= 4

Putting values:

$^nC_k=\frac{n!}{k!(n-k)!}\\^7C_4=\frac{7!}{4!*3!}\\ ^7C_4=\frac{7*6*5*4!}{4!*3!}\\ ^7C_4=\frac{7*6*5}{6}\\ ^7C_4=35$

So, Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Keywords: Probability

Learn more about Probability at:

#learnwithBrainly

7 0

2 years ago