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Contact [7]
3 years ago
13

How many ways can choose 7 friends to be invited to the party out of 20 total friends?

Mathematics
1 answer:
Lelu [443]3 years ago
3 0

Answer:

Each of the 7 friends could be present or not present (2 cases) at the party giving total of  27  scenarios.

Since at least one must be present we exclude the case that none of them is present. So the answer would be:

27−1=127.

Step-by-step explanation:

i actually dont know but can you report me and dont ask

You might be interested in
the amount of money in a bank account can be represented by the equation a(m)=30m+180, where A(m) is measured in dollars and m i
Pavlova-9 [17]
<h2>It represents that , the amount of money in the bank account is $1680 after 50 months.</h2>

Step-by-step explanation:

Given , the amount of money in a bank account can be represented by the equation A(m) = 30m +180, where A(m) is measured in dollar and m is measured in month.

When A(m) = 1680

1680 = 30m +180

⇔30m = 1680 -180

⇔30m = 1500

⇔m= \frac{1500}{30}

⇔ m = 50

It represents that , the amount of money in the bank account is $1680 after 50 months.

5 0
3 years ago
A cuboid with a volume of 924 cm^3 has dimensions
eduard

Answer:

21

Step-by-step explanation:

Volume of a cuboid is given by

V = l*w*h

924 = 4 (x+1) (x+11)

FOIL

924 = 4(x^2 +11x+x+11)

924 = 4(x^2+12x+11)

Divide each side by 4

231 = (x^2+12x+11)

Subtract 231 from each side

0 = x^2 +12x +11-231

0 = x^2 +12x - 220

Factor

0 = (x+22) (x-10)

Using the zero product property

x+22 =0  x-10 =0

x=-22  x=10

We cannot have a negative length

x=10

The side lengths are 4, 10+1, 10+11

4,11,21

The longest is 21

4 0
3 years ago
9 + 9h<br> =<br> 10h + 2 is this infinite solution
Kamila [148]

Answer:

no, h=7

Step-by-step explanation:

9+9h = 10h+2

9=h+2

7=h

7 0
3 years ago
The length of a rectangle is four times it’s width. If the perimeter of the rectangle is 100ft find it’s area
vitfil [10]

Answer:

160 ft squared

Step-by-step explanation:

I don't have one it's a pretty easy question

8 0
3 years ago
Why does a triangle have three sides if a pillow has four.
OlgaM077 [116]
A triangle has three sides and a pillow has four
7 0
3 years ago
Read 2 more answers
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