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2 years ago

14

100 people at dinner. 90 had French heritage, 80 had English heritage, and 75 had Native American heritage. At least how many ha

d heritage from all theee cultures?

2 answers:

mixer [17]2 years ago

8 0

Its 45 XD 245-100 = 45 >:)

Marina CMI [18]2 years ago

7 0

At least there should be 245 people at dinner if u add 80,90, and 75

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(2x1)+(2x4)=2x(?+?) what’s the ?

valina [46]

Answer:

20

Step-by-step explanation:

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3 years ago

Please help due today

FromTheMoon [43]

Answer:

It's gotta be either A or B because C and D don't even make up a square.

I believe that it's one of those ( A or B).

Step-by-step explanation:

Sorry I couldn't help you all the way through to the answer. Hope this helps though! :)

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2 years ago

Which pair of equations represents two perpendicular lines? <br>answers shown in picture.

kolezko [41]

Answer:

y =1/2x+6

y = -2x+2

Step-by-step explanation:

Perpendicular line have slopes that multiply to -1

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3 0

3 years ago

Factorise 9w² - 100<br><br><br>

ohaa [14]

Answer:

$9\, w^{2} - 100 = (3\, w - 10) \, (3\, w + 10)$ .

Step-by-step explanation:

Fact:

$\begin{aligned} & (a - b)\, (a + b)\\ =\; & a^{2} + a\, b - a\, b - b^{2} \\ =\; & a^{2} - b^{2} \end{aligned}$ .

In other words, $(a^{2} - b^{2})$ , the difference of two squares in the form $a^{2}$ and $b^{2}$ , could be factorized into $(a - b)\, (a + b)$ .

In this question, the expression $(9\, w^{2} - 100)$ is the difference between two terms: $9\, w^{2}$ and $100$ .

$9\, w^{2}$ is the square of $3\, w$ . That is: $(3\, w)^{2} = 9\, w^{2}$ .
On the other hand, $10^{2} = 100$ .

Hence:

$9\, w^{2} - 100 = (3\, w)^{2} - (10)^{2}$ .

Apply the fact that $a^{2} - b^{2} = (a - b) \, (a + b)$ to factorize this expression. (In this case, $a = 3\, w$ whereas $b = 10$ .)

$\begin{aligned}& 9\, w^{2} - 100 \\ =\; & (3\, w)^{2} - (10)^{2} \\ = \; & (3\, w - 10)\, (3\, w + 10)\end{aligned}$ .

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2 years ago

I really need the answers to these questions so can anybody tell me the answers

loris [4]

It's really important that you aim to understand how to do these problems yourself, rather than "pay" others to do them for you. Why not ask for "directions" or "guidance," instead of for "answers?"

This is a tricky question because it's not required that you have the full 12 beads on the string in every case. You could, for example, have 6 beads, 2 of which would be red, making the ratio of red beads 2 to 6, or 1 to 3.

What about 3 red beads in 9?
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Do these "answers" satisfy the requirement that the ratio of red beads to all beads is 1:3?

5 0

3 years ago