X^2−1.78x, if x=2.78

Answers

Answer 1
Answer:

Answer:

2.78

Step-by-step explanation:

We are given the expression x^2-1.78x

As we know that x=2.78, we can plug that value into the expression and simplify it

(2.78)^2-1.78(2.78)\n\n7.7284-4.9484\n\n2.78


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A shipping container is in the shape of a right rectangular prism with a length of 2 feet, a width of 14.5 feet, and a height of 14 feet. The container is completely filled with contents that weigh, on average, 0.9 pound per cubic foot. What is the weight of the contents in the container, to the nearest pound?

Answers

Answer:

1.8k AND 57k

Step-by-step explanation:

Which equation to solve the problemIt takes Zane m minutes to clean his room.  This is 35 minutes more that the 22 minutes it takes to walk the dog.  How long does it take to clean his room?

A. m-35=22
B. m+22=35
C. 35-m=22
D. m+35=22

Answers

The equation labeled ' A ' will lead you to the correct value of ' m ' .
I think the answer is A because 35 mins more that the 22 mins it takes to walk the dog so have to be 22+35

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?x2(4x + 1) – 2(4x + 1)
x2(4x – 1) + 2(4x – 1)
4x2(x + 2) – 1(x + 2)
4x2(x – 2) – 1(x – 2)

Answers

group first 2 and group last 2 and find factors and undistribute

(4x^3+x^2)+(-8x-2)
(x^2)(4x+1)+(-2)(4x+1)
x^2(4x+1)-2(4x+1)
answer is first one

The way to determine the factors of the given polynomial is; x²(4x + 1) - 2(4x + 1)

How to factorize polynomials?

We are given the polynomial;

4x³ + x² – 8x – 2

We can group the polynomial as follows;

(4x³ + x²) + (-8x - 2)

This grouping can be further factorized to get;

x²(4x + 1) + (-2)(4x + 1)

⇒ x²(4x + 1) - 2(4x + 1)

Read more about polynomials at; brainly.com/question/4142886

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About 7/10 of the human body is water. How many pounds of water are in a person who weighs 120 pounds?

Answers

7/10 = .70

120 * .70 = 84

84 pounds of blood in the body of an 120 pound person.

Final answer:

The weight of water in a person's body can be determined by multiplying the total body weight by 0.7, since about 70% of the human body is water. So for a person weighing 120 pounds, 120 * 0.7 = 84 pounds of their weight is water.

Explanation:

To determine how much water is in a person's body who weighs 120 pounds, we will have to multiply the total weight of the person by the proportion of the human body that is water. We know that about 70% (or 7/10) of the human body is water. In mathematical terms, that can be done as follows:

  • Convert the percentage to a decimal by dividing by 100 or simply using the given fraction 7/10 which is equivalent to 0.7.
  • Multiply the weight of the person (120 pounds) by the decimal. So, 120 * 0.7 = 84 pounds.

Therefore, a person who weighs 120 pounds has approximately 84 pounds of water in their body.

Learn more about Body Water Content here:

brainly.com/question/17147814

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the line defined by the equation y=-(4/7)x+5 is prependicular to the line defined by which equation ? (1) y=(4/7)x+3 (2) y=-(4/7)x+3 (3) y=-(7/4)x+3 (4) (7/4)x+3

Answers

y=mx+b
m=slope

perpendicular lines have slopes that multiply to -1

the line we have is y=-4/7x+5
therefor
if the slope we are looking for is m
(-4/7)m=-1
times -7/4 both sides
m=7/4
we are looking for
y=7/4x+b


last one is answer  

In rhombus ABCD, AB = 2x - 2 and BC = x + 8. Find the length of BCPlease help!!

Answers

AB = BC ;
2x - 2 = x + 8 ;
x = 10 ; 
BC = 18