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3 years ago

NUMBER 4 PLZ ONLY HAVE 5 MINUTES TO ANSWER OR I FAIL!!!!!!

Mathematics

1 answer:

erastovalidia [21]3 years ago

7 0

Too bad lol potatos looking as s s s

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If a car travels at a uniform speed at 72 kilometers per hour, how many kilometers does it travel in 15

ruslelena [56]

Answer:

18 kilometres

Step-by-step explanation:

Speed of the car is 72 kilometres per hour

means the car runs 72 kilometers within 60 minutes

so, the car will travel in 15 mins,

72×15/60

= 72/4 = 18 kilometres

3 0

3 years ago

This is the variable, usually shown on the y-axis, that gets its value from the one on the x-axis.

Furkat [3]

You need to have a little more detail in your answer, sir or madam.

8 0

4 years ago

Estimate to the nearest 0.5 unit and classify the extrema for the graph of each function.

VLD [36.1K]

$f(x) = x^3+x^2-x$

Finding the extreme point :

$f'(x)=3x^2+2x-1=0\\\\3x^2+3x-x-1=0\\\\3x(x+1)-1(x+1)=0\\\\(3x-1)(x+1)=0\\\\x=\dfrac{1}{3}\ ,\ x=-1$

Now,

f''( x ) at x = 1/3 and -1 is :

$f''(x)=6x+2\\\\f''(1/3)=4 \\\\f''(-1)=-4$

Therefore, it is maximum at x = -1 and minimum at x = 1/3 .

Hence, this is the required solution.

3 0

3 years ago

Can someone help me with this i got the question wrong the first time so its not 7.50

Sedaia [141]

Answer: $7.6502

Step-by-step explanation:

Grape cost $1.19 per pound. 3.16 pounds are bought. The total amount paid for grape will be:

= $1.19 × 3.16

= $3.7604

Peaches cost $1.29 per pound. 1.35 pounds are bought. The total amount paid for peaches will be:

= $1.29 × 1.35

= $1.7415

Peers cost $0.99 per pound. 2.17 pounds are bought. The total amount paid for pears will be:

= $0.99 × 2.17

= $2.1483

Total bill paid will be:

= $3.7604 + $1.7415 + $2.1483

= $7.6502

4 0

3 years ago

Darren bought some paint. He used 2 1/4 gallons painting his living room. After that, he had 3 5/6 gallons left. How much paint

Otrada [13]

Answer: $6\frac{1}{12}\ gallons$

Step-by-step explanation:

We can make the conversion from mixed numbers to improper fractions:

Multiply the whole number part by the denominator of the fraction.
Add the numerator of the fraction and the product obtained (This sum will be the new numerator).
The denominator is the same.

Then:

$2\frac{1}{4}=\frac{(2*4)+1}{4}=\frac{9}{4}\\\\3\frac{5}{6}=\frac{(6*3)+5}{6}=\frac{23}{6}$

We need to add the fractions in order to calculate the amount of paint Darren bought. Since the denominators are differente, we must find the Least Common Denominator (LCD):

$4=2*2=2^2\\\\6=2*3\\\\\\LCD=2^2*3=12$

Then:

$\frac{9}{4}+\frac{23}{6}=\frac{27+46}{12}=\frac{73}{12}\ gallons$

To convert this improper fraction to a mixed number:

When you divide 73 by 12 you get a quotient of 6. This will be the whole number.
The remainder obtained is 1. This will be the numerator of the fraction.
The denominator does not change.

Then:

$\frac{73}{12}\ gallons=6\frac{1}{12}\ gallons$

7 0

3 years ago

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