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3 years ago

Please please please please please please thank please please please help me please ASAP

Mathematics

1 answer:

atroni [7]3 years ago

4 0

Answer:

Step-by-step explanation:

3x^2 + 2(y-1)/x+y^2

3(4)^2 + 2(3-1)/4+3^2

3x16+2x2/4+9

48+4/13

52/13

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2 years ago

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Find the perimeter of a rhombus the length of whose diagonals are 10 cm and 24 m.

Svet_ta [14]

check the picture below.

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3 years ago

Let f(x)=x^2 and g(x)=x-2. Find (fog)(-3).

Mnenie [13.5K]

Answer:

Step-by-step explanation:

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2 years ago

After 8 points are added to each score in a sample, the mean is found to be M= 40. What was the value for the original mean

MArishka [77]

Answer:

The value for the original mean = 32

Step-by-step explanation:

Here, we want to calculate the original value of the mean.

Let the number of samples be n

Mathematically;

mean = Total value/n

Now, we added 8 to each of values; total value added = 8 * n = 8n

Now, for the new mean of 40; we have

(Total value + 8n)/n = 40

Total value + 8n = 40n

Total value = 40n -8n

Total value = 32n

kindly recall from the beginning of the solution;

mean = Total value/n

mean = 32n/n

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6 0

2 years ago

Two hours after a truck leaves phoenix traveling 45 miles per hour, a car leaves to overtake the truck. if it takes the car ten

Sergeeva-Olga [200]

Answer:

The correct answer is 54 miles per hour

Step-by-step explanation:

To solve this problem we have to use the formula of

Speed=Distance/time

Both, car an truck made the same distance, so

Distance car=Speed car*time car

Distance truck =Speed truck*time truck

Distance car=Distance truck

So Speed car*time car =Speed truck*time truck

Speed car =Speed truck* time truck /time car

Time truck = time car +2 ( truck leaves 2 hours before)

Time car =10

Speed car =45 miles per hour* 12 /10

Speed car = 54 miles per hour

4 0

3 years ago