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3 years ago

I need help with this math

Mathematics

2 answers:

Tems11 [23]3 years ago

8 0

15/15 or 1 is your answer.

Georgia [21]3 years ago

8 0

15/15 or 1 is your answer

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Help me please FOR A GRADE ‼️ What is an equation of the line that is parallel to Y=4x-1 one and that passes through the point -

Sliva [168]

Slope-intercept form:

y = mx + b

"m" is the slope, "b" is the y-intercept (the y value when x = 0, or (0,y))

For lines to be parallel, their slopes have to be the SAME.

The given line's slope is 4, so the parallel line's slope is also 4.

y = 4x + b

To find "b", plug in the point (-3,5) into the equation.

y = 4x + b

5 = 4(-3) + b

5 = -12 + b Add 12 on both sides

17 = b

y = 4x + 17

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4 years ago

A halyard 22 ft long is cut into two pieces. If L is the length of one piece, express the length of the second piece in terms of

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3 years ago

What number is 10, 24, 256, 64, 164?<br><br> please

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4 years ago

Read 2 more answers

A certain ferry moves up and down a river between Town A and B. It takes the ferry two hours to travel to Town A and only an hou

Y_Kistochka [10]

Answer:

The distance between two cities is <em>60 miles.</em>

Step-by-step explanation:

Time taken to travel from B to A = 2 hours

Time taken to travel from A to B = 1.5 hours

Current speed = 5 mph

Let the speed of ferry in still water = <em>u</em> mph

When the ferry moves with the current, it will taken lesser time (i.e. A to B) and when it moves against the current it will take more time (i.e. B to A).

Let the distance between the two cities A and B = D miles

While moving with the current, speed = $(u+5)\ mph$

While moving against the current, speed = $(u-5)\ mph$

Formula for Distance = Speed $\times$ Time

Distance traveled in each case is same i.e. D.

So,

$D = (u+5) \times 1.5 = (u-5) \times 2\\\Rightarrow 1.5u+7.5=2u-10\\\Rightarrow 0.5u =17.5\\\Rightarrow u = \dfrac{175}{5}\\\Rightarrow u = 35 \ mph$

Now,

$D = (u+5) \times 1.5\\\Rightarrow D =(35+5) \times 1.5\\\Rightarrow D =(40) \times 1.5\\\Rightarrow \bold{D =60\ miles}$

So, the distance between two cities is <em>60 miles.</em>

6 0

3 years ago

One factor of f (x ) = 5 x cubed 5 x squared minus 170 x 280 is (x 7). what are all the roots of the function? use the remainder

olga2289 [7]

The roots of the function f(x) = 5x³ + 5x² - 170x + 280 are 2, 4 and -7

<h3>How to determine the roots of the function?</h3>

The function is given as:

f(x) = 5x³ + 5x² - 170x + 280

Factor out 5 in the function

f(x) = 5(x³ + x² - 34x + 56)

One of the roots is x + 7.

So, we have:

f(x)/(x + 7) = 5(x³ + x² - 34x + 56)/(x + 7)

Factor the expression on the right-hand side

f(x)/(x + 7) = 5((x - 2)(x - 4)(x + 7))/(x + 7)

Cancel out the common factors

f(x) = 5((x - 2)(x - 4)(x + 7)

Set the function to 0

5((x - 2)(x - 4)(x + 7) = 0

Divide through by 5

(x - 2)(x - 4)(x + 7) = 0

Expand

x - 2 = 0 or x - 4 = 0 or x + 7 = 0

Solve for x

x = 2, or x = 4 or x = -7

Hence, the roots of the function f(x) are 2, 4 and -7