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2 years ago

Find the sum. Enter your answer in the box below as a fraction, using the slash mark ( / ) for the fraction bar.

Mathematics

1 answer:

Rom4ik [11]2 years ago

5 0

Answer:

5/7

Step-by-step explanation:

2/7 + 3/7

Denominator are equal so adding numerator,

(2+3)/7 = 5/7

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I know the answer is C. but I need to know how to solve it!

otez555 [7]

Yes you are right it's C)
Notice that f(-2) = (-2)³ +2( - 2)² + 4(-2) + 8 =0
Then x³+2x²+4x+8 is divisible by (x+2)
Perform this division & you will get:

x³+2x²+4x+8 = (x+2)(x²+4)
The root of (x+2) is the value that render it nil, that is x=-2
The root of (x²+4) are imaginary (not real) because
x²+4 =0 ==> x² = -4 & x=√-4 or x= 2i (nor real).
Hope you understood the reasoning

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2 years ago

A line that includes the point(4, 5)has a slope of 0 .What is its equation in slope-intercept form?

Tju [1.3M]

Answer:

y = 5

Step-by-step explanation:

y = 0x + b

5 = 0(4) + b

5 = 0 + b

5 = b

3 0

2 years ago

Translate into an algebraic expression: If I travel d miles in h hrs downstream on a river with a current of c mph, what would m

xenn [34]

Answer:

The speed is still water is $v = \frac{d}{h} - c$ .

Step-by-step explanation:

Dimentionally speaking, speed is distance divided by time. Since, the person is travelling downstream, absolute speed is equal to the sum of current speed and speed of the person regarding current. Both components are constant. That is:

$c + v = \frac{d}{h}$

Where:

$c$ - Current speed, measured in miles per hour.

$v$ - Speed of the person regarding current, measured in miles per hour.

$d$ - Distance travelled downstream, measured in miles.

$h$ - Time spent on travelling, measured in hours.

Speed in still water occurs when current speed is zero. Then, such variable is obtained after subtracting current speed on both sides of the expression. Hence:

$v = \frac{d}{h} - c$

The speed is still water is $v = \frac{d}{h} - c$ .

4 0

3 years ago

Scientists say we should sleep 3/8 of a day.How about many hours is this

meriva

9 hours because 8 x 3 = 24 and 3 x 3 = 9

7 0

2 years ago

I’m really confused by this and need help?

AlekseyPX

Divide 150 by 50 to get 3