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Mathematics

2 answers:

krek1111 [17]3 years ago

5 0

what is this?

please help me

Mekhanik [1.2K]3 years ago

5 0

Answer:

v nfenj vqrevrkl

Step-by-step explanation: We do not allow links here :)

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When two fair dice are rolled, what is the probability of getting a sum of 7, given that the first die rolled is an odd number?

kupik [55]

For each of the possible outcomes add the numbers on the two dice and count how many times this sum is 7. If you do so you will find that the sum is 7 for 6 of the possible outcomes. Thus the sum is a 7 in 6 of the 36 outcomes and hence the probability of rolling a 7 is 6/36 = 1/6.

4 0

3 years ago

X + Y is equal to 5 x minus Y is equal to 4 find the value of find the value of x square minus y square

Grace [21]

Answer: 20

Step-by-step explanation:

x+y=5

x-y=4

---------

x+y=5

x=4+y

--------

(4+y)+y=5

4+y+y=5

4+2y=5

2y=1

y=0.5

x=4.5

---------

x²-y²=(4.5)²-(0.5)²=20.25-0.25=20

7 0

3 years ago

Select the correct answer.

Naddik [55]

You use the FOIL method, and how you do this is -

(x - 7) (x + 8)

Multiply the first x by both numbers in the second factor. Which means, you multiply x by x and 8, the two in (x + 8).

With this, you get -
x^2 + 8x

Then do the same thing with -7.

-7x - 56

Then combine the two.
x^2 + 8x - 7x - 56

Combine like terms.

x^2 + x - 56

So now, 7 x 8 is 56
And -7 + 8 would be 1. And that is the value of “x” which is b in the form a^2x + bx + c.

Now with this, you take those two numbers and make the factors =
(x + 8) (x - 7)

Then you set these equal to 0.

x + 8 = 0

Subtract the 8 from both sides.

x = -8

————

x - 7 = 0

Add the 7 on both sides.

x = 7

Answer: A

8 0

3 years ago

Read 2 more answers

Drag the tiles to the correct boxes to complete the pairs not all tiles will be used match each quadratic graph to its respectiv

ch4aika [34]

Answer:

Part 1) The function of the First graph is $f(x)=(x-3)(x+1)$