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2 years ago

Find the sum. Write your answer in standard form. (7x +13) + (x3 + 4x2 – 8)

Mathematics

2 answers:

mel-nik [20]2 years ago

6 0

Answer:

. Simplify: (4x2 - 2x) - (-5x2 - 8x).

Solution:

(4x2 - 2x) - (-5x2 - 8x)

= 4x2 - 2x + 5x2 + 8x.

= 4x2 + 5x2 - 2x + 8x.

= 9x2 + 6x.

= 3x(3x + 2).

Answer: 3x(3x + 2) Step-by-step explanation:

iris [78.8K]2 years ago

5 0

The answer is 4x^2+10x+5

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The graph of the equation y=7x-3 has what slope?

Nikitich [7]

The slope of the line would be 7

3 0

3 years ago

Read 2 more answers

The perimeter of a rectangular field is 24 m. If its length is 9m, find (i) breadth (ii) area of the rectangle

Monica [59]

Answer:

breadth: 3 m and area of rectangle: 27 m²

explanation:

part A:

perimeter of rectangle: 2 ( length + breadth )

using the formula:

24 = 2 ( 9 + breadth )

9 + breadth = 12

breadth = 3 m

part B:

area of the rectangle = length * breadth

using the formula:

9 * 3

27 m²

3 0

2 years ago

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Diego then says, If we take half of the first number and double the second, the sum is 14. Write an equation that could represen

Luden [163]

Step-by-step explanation:

let the first number be x

let the second number be y

½ of the first number= ½x

Double the second; 2*y=2y

the sum... that is ½x+2y=14

8 0

3 years ago

Maria drove to a business appointment at 50mph in the morning. Her average speed on the return trip in the afternoon was 40 mph.

MakcuM [25]

Answer:

Distance to appointment point = 5 miles

Step-by-step explanation:

Let s be the distance to the appointment point,

We have Maria drove to a business appointment at 50mph in the morning.

Time taken in the morning

$t_m=\frac{s}{50}=0.02s$

Her average speed on the return trip in the afternoon was 40 mph.

Time taken in the afternoon

$t_a=\frac{s}{40}=0.025s$

Given that the return trip took 1/4hr longer because of traffic.

That is

$t_a-t_m=\frac{1}{4}hr=0.025hr$

Substituting

$t_a-t_m=0.025hr\\\\0.025s-0.02s=0.025\\\\s=5miles$

Distance to appointment point = 5 miles

7 0

3 years ago

A Social Security number consists of nine digits in a particular order, and repetition of digits is allowed. After seeing the l

Alexxx [7]

Answer: $\dfrac{1}{100,000}$

Step-by-step explanation:

Given : The total number of digits in number system (0 to 9) = 10

The number of digits in a social security number = 9

After last four digits are printed, the number of digits remaining to print = 9-4=5

Since , repetition of digits is allowed, then the total number of ways to print 5 remaining digits is given by :-

$10\times10\times10\times10\times10=100,000$

Now, the probability of getting the correct Social Security number of the person who was given the receipt is given by:-

$\dfrac{\text{Number of correct code}}{\text{Total number of codes}}\\\\=\dfrac{1}{100,000}$

7 0

3 years ago