All categories

2 years ago

QUICK ANSWER PLEASE Evaluate for x = ─ 3 and y = 4. Problem is -1/2(2x-y)

Mathematics

2 answers:

4vir4ik [10]2 years ago

8 0

Answer:

solution,

$given \\ x = - 3 \\ y = 4 \\ - \frac{1}{2} (2x - y) \\ = - \frac{1}{2} (2 \times ( - 3) - (4)) \\ = - \frac{1}{2} \times ( - 6 - 4) \\ = - \frac{1}{2} \times ( - 10) \\ = - 1 \times ( - 5) \\ = 5$

hope this helps...

Good luck on your assignment..

OLga [1]2 years ago

7 0

Answer:

Step-by-step explanation:

when the question asks for evaluate, always substitute the expression with the values given.

So, her x = -3 and y=4

So we find 1/2 of 2x - y

This is also half of -6-4 = -half of -10 = 5

Hope this helps,

Good Luck

You might be interested in

The sum of two integers is 26. the sum of the squares of the two integers is 340. what is the product of the two numbers?

Phoenix [80]

Lets say that the two unknown integers are $n$ and $m$ .

We know the following things about $n$ and $m$ :

$n+m=26$
$n^2+m^2=340$

And, we want to find $nm$ .

To solve this, we'll use the expansion of the squared of the sum of any two inegers; this is expressed as:

$(n+m)^2=n^2+2nm+m^2$

So, given what we know about the unknown integers, the previous can be written as:

$(26)^2=340+2nm$

We can easily solve for $nm$ :

$nm= \frac{(26)^2-340}{2}= \frac{676-340}{2}= \frac{336}{2}=168$

The answer is 168.

Another approach to solve the problem is, from the two starting equations, compute the values of $n$ and $m$ , which are 12 and 14, and directly compute their product; however, the approach described is more elegant.

5 0

2 years ago

how could you estimate the volume of the box if you didn't know anything except the volume of the cylinder inside it?

kobusy [5.1K]

Answer:

Step-by-step explanation:

Since the box contains a cylinder, the height of the box must be gt; = cylinder height

And the area at the bottom of the box is definitely larger than the area at the bottom of the cylinder.

The area at the bottom of the cylinder is PI r squared,

If the bottom of the box is a square, then the area of the bottom is 4r^2, whereas the bottom tends to be polygon, which is equivalent to cutting the circle into equal parts by circle cutting.

So the area at the bottom of the box is $\lim_{ Number of polygon edges\to \infty} \pi r^{2}$ ，

It follows that the volume of the box is greater than the volume of the cylinder

6 0

2 years ago

The formula for converting degrees Fahrenheit (F) to degrees Kelvin (K) is:

drek231 [11]

K = F + 459.67

Subtract K on both sides:

0 = F - K + 459.67

Subtract F on both sides:

-F = -K + 459.67

Divide each term by -1 so that the variables are positive:

F = K - 459.67

5 0

3 years ago

What is the do.ain and range of (1,9), (2,7), (5,4), (7,12) (3,9)

inysia [295]

Domain: {1,2,3,5,7}
Range: {4,9,7,12}

6 0

3 years ago

Use a calculator to find the value of each expression. Round your answer to the nearest hundredth.

inysia [295]

Answer:

Arcsin(1/5) = 0.20

Arcsin(-0.34) = -0.35

Arcsin(0.6) = 0.64

Step-by-step explanation:

Using a calculator we can find the value of each expression:

Arcsin(1/5) = 0.20135792079, rounding to the nearest hundredth we have that: Arcsin(1/5) = 0.20.

Arcsin(-0.34) = -0.346916897527, rounding to the nearest hundredth we have that: Arcsin(-0.34) = -0.35

Arcsin(0.6) = 0.643501108793, rounding to the nearest hundredth we have that: Arcsin(0.6) = 0.64

8 0

2 years ago