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RoseWind [281]
3 years ago
11

Whats the answer for number 3

Mathematics
1 answer:
Karolina [17]3 years ago
5 0

cant see the full question ;/

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How can you use the number of inches in one foot to find the number of square inches in one square foot?
d1i1m1o1n [39]
There are 12 inches in 1 foot. You know that the area of a square is or base times hight. A square has the same base and height. So we can say (base)^2. If the base is 12 inches in this case 12^2 = 144. Answer: 144 square inches.
8 0
3 years ago
£360 is shared between Abby, ben, chloe and denesh. the ratio of the amount abby gets to the amount that ben gets is 2:7. chloe
Gwar [14]

Answer:

210 £

Step-by-step explanation:

Let amount that abby gets=x

Given that \frac{Amount\ of\ abby}{Amount\ of\ Ben} =\frac{2}{7}

Amount\ of\ ben=\frac{7}{2}\times Amount\ of\ abby\\ =\frac{7}{2}\ x

Amount of chole + amount of Danesh =1.5\timesof abby

                                                                      =1.5 \ x

x +\frac{7}{2} \ x + 1.5 \ x =360\\\\6x=360\\\\x=\frac{360}{6}\\\\x=60

Amount\ of\ Ben =\frac{7}{2}\ x = \frac{7}{2} \times 60\\\\=7\times 30\\\\=210

6 0
3 years ago
An instructor gives her class the choice to do 7 questions out of the 10 on an exam.
Maksim231197 [3]

Answer:

(a) 120 choices

(b) 110 choices

Step-by-step explanation:

The number of ways in which we can select k element from a group n elements is given by:

nCk=\frac{n!}{k!(n-k)!}

So, the number of ways in which a student can select the 7 questions from the 10 questions is calculated as:

10C7=\frac{10!}{7!(10-7)!}=120

Then each student have 120 possible choices.

On the other hand, if a student must answer at least 3 of the first 5 questions, we have the following cases:

1. A student select 3 questions from the first 5 questions and 4 questions from the last 5 questions. It means that the number of choices is given by:

(5C3)(5C4)=\frac{5!}{3!(5-3)!}*\frac{5!}{4!(5-4)!}=50

2. A student select 4 questions from the first 5 questions and 3 questions from the last 5 questions. It means that the number of choices is given by:

(5C4)(5C3)=\frac{5!}{4!(5-4)!}*\frac{5!}{3!(5-3)!}=50

3. A student select 5 questions from the first 5 questions and 2 questions from the last 5 questions. It means that the number of choices is given by:

(5C5)(5C2)=\frac{5!}{5!(5-5)!}*\frac{5!}{2!(5-2)!}=10

So, if a student must answer at least 3 of the first 5 questions, he/she have 110 choices. It is calculated as:

50 + 50 + 10 = 110

6 0
3 years ago
A rectangle has a perimeter of 6 feet.
pickupchik [31]
The answer is “A” and C
4 0
3 years ago
Read 2 more answers
What fraction is equal to 75% of 1/4
Nitella [24]

Answer:

3/16

Step-by-step explanation:

75/100 × 1/4

3/4 × 1/4

3/16

Answer

6 0
3 years ago
Read 2 more answers
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