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3 years ago

5

Michael visited his grandparents.The total distance was 280 miles.By train,he could travel 90 miles per hour.By bus he could tra

vel 60 miles per hour. How much time could Michael save by taking the train?

1 answer:

lesya692 [45]3 years ago

4 0

Michael could save about 95 minutes by taking the train.

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I need help please help me

charle [14.2K]

Answer:

umm i think its c

Step-by-step explanation:

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3 years ago

What is the side length, in inches, of the pets

tatiyna

Candy draws a square design with a side length of x inches for the window at the pet shop. She takes the design to the printer and asks for a sign that has an area of 16x2 – 40x + 25 square inches. What is the side length, in inches, of the pet shop sign?

Answer:

the length of the sign is $4x-5$ inches

Step-by-step explanation:

Given

Area of the square of design = $16x^{2} -40x+25$

First we find the roots of equation $16x^{2} -40x+25=0$

The roots of the quadratic equation $ax^{2} +bx^{2} +c=0$ are given by

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

where $a=16, b=-40, c=25$

$x=\frac{40\pm\sqrt{(-40)^2-4\times 16\times 25}}{2\times 16}$

$x=\frac{40\pm\sqrt{1600-1600}}{32}$

$x=\frac{40\pm\sqrt{0}}{32}$

$x=\frac{40}{32}$

$x=\frac{5}{4}$

$4x=5\\4x-5=0$

That is, the factors of the polynomial $16x^{2} -40x+25$ are $4x-5$ and $4x-5$ .

So, Area of the square design = $16x^{2} -40x+25$ = $(4x-5)^{2}$

Area of a square = Length^2

Thus, the length of the sign is $4x-5$ inches

7 0

3 years ago

Which of the following are coefficient

malfutka [58]

Answer:

2 and -3

Step-by-step explanation:

because a coefficient is a numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g. 4 in 4x).

so in 2x-3y+5, 2 and -3 are the coefficients.

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3 years ago

Mr. Ramadhan wants to save money to buy a house so he puts 21% of his earnings into his savings account. How much money does he

Trava [24]

Answer:

79%

Step-by-step explanation:

He has 100% to start off. If he puts 21% into savings you subtract that from the starting amount. 100 - 21 = 79. Therefore the answer is 79%.

6 0

3 years ago

Read 2 more answers

Evaluate the algebraic expression when x=10

matrenka [14]

https://www.mathpapa.com/algebra-calculator.html?q=x%3D10x%2F2%2B5

Step-by-step explanation:

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3 years ago