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3 years ago

Need help with number 1 please

Mathematics

1 answer:

aev [14]3 years ago

3 0

Answer:

Step-by-step explanation:

P(AintersectB) = P(A) x P(B)

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7. Graph the following:<br> y = x/2 -3

Elodia [21]

Answer:

Step-by-step explanation:

pls mark me brainliest

8 0

3 years ago

Can you see an easy way to work out the value of <img src="https://tex.z-dn.net/?f=%5Csqrt%7B%201%5E3%20%2B%202%5E3%20%2B%203%5E

Lina20 [59]

We have the sum of cubes identity

$a^3 + b^3 = (a + b) (a^2 - ab + b^2)$

and observing that 1 + 4 = 2 + 3, we have

$1^3 + 4^3 = (1 + 4) (1^2 - 4 + 4^2) = 5 \times 13$

and

$2^3 + 3^3 = (2 + 3) (2^2 - 6 + 3^2) = 5 \times 7$

Then

$\sqrt{1^3+2^3+3^3+4^3+5^3} = \sqrt{5\times13 + 5\times7 + 5\times5^2} = \sqrt{5 \times (20 + 25)} \\\\ ~~~~~~~~ = \sqrt{5^2 \times (4 + 5)} = \sqrt{5^2\times9} = \sqrt{5^2\times3^2} = 5\times3 = \boxed{15}$

Alternatively, we have the well-known sum of cubes formula

$\displaystyle \sum_{i=1}^n i^3 = \frac{n^2(n+1)^2}4$

The sum under the square root is this sum with $n=5$ . Then

$1^3+2^3+3^3+4^3+5^3 = \dfrac{5^2\times6^2}4 = 225 = 15^2$

and so the square root again reduces to 15.

5 0

2 years ago

Lynn goes to the supermarket and purchases 6 boxes of cookies for $11.04. Each box contains 8 cookies. What is the price per coo

aksik [14]

Answer:

Step-by-step explanation:

6 x 8 = 48

11,04 x 6 = 66,24

66,24/48 = 1,38$

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4 years ago

What is the rate and unit rate of 36:8 if you multiply 18 and 4 by 2

Eduardwww [97]

The unit rate is 4:1

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4 years ago

Help meeeeee pwease

Serga [27]

Maybe A because that’s in the middle but it does not show!

6 0

3 years ago