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julia-pushkina [17]
3 years ago
12

Evaluate 7xy ÷ w + 4z when w = 10,x = 2,y = 5, and z = 9

Mathematics
1 answer:
MissTica3 years ago
4 0
First,, we need to insert the numbers in before we can start solving. This will change the expression to the following:
7(2)(5) ÷ 10 + 4(9)
We are first going to begin solving this by calculating the expression 7 × 2 × 5 ÷ 10. We can start this solving this by multiplying 2 by 5.
7 × 10 ÷ 10
Any expression divided by itself equals 1,, so the expression changes to:
7 × 1 
Any expression multiplied by 1 remains the same,, so add 7 back into the equation.
7 + 4 × 9
Multiply the numbers together.
7 + 36
Lastly,, add the numbers together to find your final answer.
43
Let me know if you have any further questions.
:)
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3 years ago
What is the value of discontinuity of x^2+8x+4/x^2-x-6? Choices:
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Answer:

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Step-by-step explanation:

Hello,

First of all, let's check the denominator.

x^2-x-6 \ \ \text{ *** How to factorise it ...? ***}\\\\\text{*** The product of the roots is -6=-2*3 and their sum is 1 ***}\\\\x^2-x-6=x^2-3x+2x-6=x(x-3)+2(x-3)=(x+2)(x-3)

Now, let's see the numerator.

x^2+8x+4 \ \text{ *** -2 is not a zero as ***}\\\\(-2)^2+8*(-2)+4=4-16+8=-4\\\\\text{*** 3 is not a zero as ***}\\\\3^2+8*3+4=9+24+4=37\\

So we cannot factorise the numerator with (x+2) or (x-3)

Then, -2 and 3 are the the discontinuities of the expression.

There is only -2 in the list, this is the correct answer.

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

3 0
2 years ago
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3 years ago
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joanne claims that (2,4) is the midpoint of the segment connecting the points (-3,5) and (7,3) is she correct? explain how you k
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Answer:

(2, 4) is correct

Step-by-step explanation:

To find the midpoint use the midpoint formula

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