MATHEMATICS HIGH SCHOOL

Tom took a trip of 1,020 miles. He traveled by train at 55 miles an hour and the same number of hours by plane at 285 mph. How many hours did the trip take? 3 hours
6 hours
8 hours

Answers

Answer 1

Answer: it would take 3.5 hours just by plane

and 18.5just by train

so the answer is 6 hours

Answer 2

Answer:

Answer:

the correct answer is 6 hours

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URGENT PLZ HELP: Graph y = tanx for -pi/4 ≤ x ≤ x/4.What is the range?

I need help please. message please

Answers

V = lwh
w = V/lh

C = πd
d = C/π

A = 1/2 h(b1 + b2)
2A = h(b1 + b2)
h = 2A/(b1 + b2)

To increase an amount by 3% what single multiplier would you use?

Answers

The awnser would be .03

I understand some of this but this ones got me stumped i tried pemdas but im still lost

Answers

Just replace $x$ with its given value:

$9x^(2)-4x-3~~~~\text{where }x=-2\n \n \n 9\cdot (-2)^(2)-4\cdot (-2)-3\n \n =9\cdot 4+8-3\n \n =36+8-3\n \n =41$

how much did briana save by purchasing a backpack that cost $45 with a sales promotion of 20% off instead of a backpack that cost $42 with a sales promotion of 10% off?

Answers

Start by doing a proportion for each one. 20/100= x/45. 45 times 20 equals 900. 900 divided by 100 equals 9. So 20% off is $9 which makes you pay $36. Do the next proportion. 10/100=x/42. 42 times 10 is 420. 420 divided by 100 equals 4.2. You would get off $4.2 which makes you pay $37.8. $37.8-$36= $1.8. Your answer is $1.8

Answer:

Its A

Step-by-step explanation:

multiplying polynomials

(3m-1)(8m+7)

Answers

$(3m-1)(8m+7)=3m\cdot 8m+3m\cdot 7-1\cdot 8m-1\cdot 7=\n \n=24m^2+21m-8m-7=24m^2+13m-7$

The product of (3m-1)(8m+7) is 24m² + 13m - 7.

To multiply the polynomials (3m-1)(8m+7), we can use the distributive property. We multiply each term in the first polynomial by each term in the second polynomial and then combine like terms.

(3m-1)(8m+7) = 3m(8m) + 3m(7) - 1(8m) - 1(7)

Simplifying this expression, we get:

24m² + 21m - 8m - 7

Combining like terms, we have:

24m² + 13m - 7

Therefore, the product of (3m-1)(8m+7) is 24m² + 13m - 7.

We can also see that this product represents a quadratic polynomial. The highest power of the variable "m" is 2, which is indicated by the term 24m². The other terms, 13m and -7, represent the linear and constant parts of the polynomial, respectively.

The result is a quadraticpolynomial in standard form, where the terms are arranged in descending order of the variable's exponent. In this case, the quadratic polynomial is 24m² + 13m - 7.

To learn more about Polynomials;

brainly.com/question/11536910

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In a group of 20 there are 7 boys what is the ratio of girls to boys?