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3 years ago

Helpppppppppp outtttt

Mathematics

2 answers:

irina [24]3 years ago

4 0

Turn the improper fraction 2(3/4) into a mixed fraction by multiplying the coefficient or outside number "2" by the denominator "4" and then adding that result with the numerator "3":

2*4 = 8

8 + 3 = 11

Leave the denominator fixed and put you previous result as the numerator; your new fraction is 11/4

Now multiply this with 4/5:

11/4 * 4/5 = 44/20 = 22/10 = 11/5 (simplified result)

Now convert this simplified mixed fraction back into an improper fraction:

You divide the denominator "5" into the numerator "11" and put the most amount of times it goes into it out front as the coefficient;

We get that 5 goes into 11 a maximum number of times which is 2.

Then subtract the numerator "11" from "10" (5 *2) and we get 1.

Our answer is 2(1/5)

faust18 [17]3 years ago

4 0

The answer is 2 1/5 I believe

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On a trip to visit friends, a family drives 65 miles per hour for 208 miles of the trip. If the entire trip was 348 miles and to

vodka [1.7K]

From information given, we know
208 miles was at rate of 65 mph. so divide total mileage by speed to get time spent.

208 ÷ 65 = 3.2 hours

So the rest of the trip took 6 - 3.2 = 2.8hours to travel another 348 total miles minus the 208 miles driven at 65mph is 140 miles.

140 miles divided by 2.8 hours gives speed

140 ÷ 2.8 = 50 miles per hour

4 0

3 years ago

Let f(x)= 6x^2+7x-4. Find: a) f(3) b) f(m) c) f(x+1) SHOW WORK PLEASE.

Leviafan [203]

Answer: b) f(m)

Step-by-step explanation:

7 0

3 years ago

(28 POINTS)

cestrela7 [59]

Answer:

(a) $-\sqrt{10}y$

(b) $-\sqrt{3}y$

Step-by-step explanation:

(a) $\sqrt{10y^{2}}$ can also be written as $\sqrt{10}$ x $\sqrt{y^{2}}$

the $\sqrt{y^{2}}$ = ± y

Therefore :

$\sqrt{10y^{2}}$ = ± $\sqrt{10}y$

since it was given that y < 0 , then the factor will be $-\sqrt{10}y$

(b) $\sqrt{3y^{2}}$ can also be written as : $\sqrt{3}$ x $\sqrt{y^{2}}$

Therefore , one of the factor is $-\sqrt{3}y$

3 0

3 years ago

I need help on #10. very confused

RideAnS [48]

Step-by-step explanation:

$\displaystyle f'(x) = \lim_{h \to 0} \dfrac{f(x + h) - f(x)}{h}$

$\:\:\:\:\:\displaystyle = \lim_{h \to 0} \dfrac{(x+h)^2 -7 -(x^2 - 7)}{h}$

$\:\:\:\:\: \displaystyle= \lim_{h \to 0} \dfrac{(x^2 +2hx + h^2 -7) - (x^2 -7)}{h}$

$\:\:\:\:\: \displaystyle= \lim_{h \to 0} \dfrac{2hx + h^2}{h}$

$\:\:\:\:\: \displaystyle= \lim_{h \to 0} (2x +h)$

$\:\:\:\:\: \displaystyle= 2x$

3 0

3 years ago

Simplify the expression

Vaselesa [24]

To simplify this expression, you have to remember that when a number or a variable is raised to the negative exponent you have to reciprocate the number. In this expression, c^-8 will be reciprocated so it will become part of the numerator. Therefore, the final answer would be 12c^8/d^2.

3 0

3 years ago