MATHEMATICS HIGH SCHOOL

If x=4 and y=-2, the value of 1/2xy^2 is

a. 32
b. 8
c. -4
d. -8

Answers

Answer 1

Answer:

Answer:

b. 8

Step-by-step explanation:

To solve, we need to plug in the x and y values since we already have the values given to us

1/2(4)(2^2)

We should do the exponents first, 2^2 is 4

Now we are left with 1/2(4)(4)

4 times 4 is 16

16 times 1/2 is the same as 16/2

16/2=8

b. 8

Answer 2

Answer: I think the answer is 8 bc 0.5 x 4 is 2 and -2 x -2 is 4 and 4x2 is 8

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Please help me answer this. Ty

The graph of the function f(x)=(x-3)(x+1)

Answers

Desmos Graphing Calculator

What is 1/3 as a decimal?

Answers

0.33333333333333333333333333333333 all you have to do is divide 1 by 3

what is 1/3 and negative 9/20 as decimals??

A vehicle travels a distance of 5t4 − 10t2 + 6 miles in t + 2 minutes. What is the vehicle's speed?

Answers

Let distance be s and velocity be v
s = 5t⁴ - 10t² + 6
We know velocity is the change in distance per unit time, so
v = ds/dt
v = 20t³ - 20t

Answer:

The speed is 5t^3 - 10t^2 + 10t - 20 + 46/(t+2) miles per minute

Step-by-step explanation:

A belt runs a pulley of radius 8 inches at 60 revolutions per minute. a) Find the angular speed in radians per minute. b) Find the linear speed in inches per minute.

Answers

Answer:

Part a) $120\pi\ (rad)/(min)$

Part b) $960\pi\ (in)/(min)$

Step-by-step explanation:

we have

60 rev/min

Part a) Find the angular speed in radians per minute

we know that

One revolution represent 2π radians (complete circle)

$1\ rev=2\pi \ rad$

To convert rev to rad, multiply by 2π

$60\ (rev)/(min)=60(2\pi)=120\pi\ (rad)/(min)$

Part b) Find the linear speed in inches per minute

we know that

The circumference of a circle is equal to

$C=2\pi r$

we have

$r=8\ in$ ----> given problem

substitute

$C=2\pi(8)$

$C=16\pi\ in$

Remember that

One revolution subtends a length equal to the circumference of the circle

$1\ rev=16\pi\ in$

To convert rev to in, multiply by 16π

$60\ (rev)/(min)=60(16\pi)=960\pi\ (in)/(min)$

What is the value for y?

Enter your answer in the box.

y =

Answers

Sides AC and CB are identical, which mean the two bottom angles are also identical.

Angle B (2x) would equal 50.

The three inside angles of a triangle equal 180, so the top angle would equal 180 - 50-50 = 80.

Now set the equation for angle C to equal 80 and solve for Y.

5y+10 = 80

Subtract 10 from each side:

5y = 70

Divide both sides by 5:

y = 70/5

y = 14

Answer:

y = 8 and x = 25

Step-by-step explanation:

Look at pic below.

Hope this helps! :)

Write 19/24 as a decimal rounded to the nearest tenth

Answers

Answer:

The answer is $0.8$

Step-by-step explanation:

Firstly, you have to know the position of the tenth decimal.

Give a decimal number, for example, $114.325$

The position of the tenth decimal places to the right of the decimal point. In this case, the number 3 is in the position of the tenth place.

Also, you have to know how to round a decimal number. The rule says:

If you want to round a number with a n-decimal digits, you have to see the position n+1-decimal digit:

If this number is equal or greater than 5, you have to increase the n-decimal digit to the next whole number.

If this number is lesser than 5, you have to decrease the n-decimal digit to the previous whole number.

Using the example $114.325$

If we want to round the decimal number to the nearest tenth, the next digit is a 2, so we dont increase the number 3. So the decimal number is 114.3

Finally, responding your question,

First you have to represent the fraction number into decimal number.

$(19)/(24) =0.791666$

The nearest tenth is the first decimal digit: 7

The next number is a 9, so if we want to round to the nearest tenth, we will have to increase the number 7 to the next whole number: 8

The final answer is $0.8$

The calculated division of the numbers 19/24 into a decimal number is 0.8

How to calculate the division of the numbers

From the question, we have the following parameters that can be used in our computation:

19/24 into a decimal number

When represented as an equation, we have

19/24 into a decimal number = 19/24

Expand

19/24 into a decimal number = 19/24

Divide 19 by 24

So, we have the following result

19/24 into a decimal number = 0.79166666666

Approximate to the nearest tenth

19/24 into a decimal number = 0.8

Using the above as a guide, we have the following:

the result is 0.8

If x=4 and y=-2, the value of 1/2xy^2 isa. 32b. 8c. -4d. -8​

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How to calculate the division of the numbers

If x=4 and y=-2, the value of 1/2xy^2 is

a. 32
b. 8
c. -4
d. -8