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marin [14]
3 years ago
14

HELP ME

Mathematics
1 answer:
kherson [118]3 years ago
7 0

Answer: 18

Step-by-step explanation: for the boys 4 times 18 equals 72 so there are 4 rows of 18. for the girls 5 times 18 is 90 so 5 rows of 18.  

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I have no idea!! Please help!!!
Ber [7]
The area of a traingle is \frac{1}{2}bh
So we need to know the base and the height
To work out the sides of a right angle triangle we can use a²+b²=c
c is the hypotenuse and a and b are the other sides
Because this triangle is isoceles we know that a and b are the same

a²+b²=c²
a²+a²=c²
2a²=c²
2a²=(x√6)²
2a²=(x√6)(x√6)
2a²=x²+x√6+x√6+6
2a²=x²+x√6+x√6+6
a²=\frac{x^{2}+x \sqrt{6}+x \sqrt{6}+6 }{2}
a=\sqrt{\frac{x^{2}+x\sqrt{6}+x\sqrt{6}+6}{2}}

A=\frac{1}{2}bh
A=\frac{1}{2}a*a
A=\frac{1}{2}×\sqrt{\frac{x^{2}+x\sqrt{6}+x\sqrt{6}+6}{2}}×\sqrt{\frac{x^{2}+x\sqrt{6}+x\sqrt{6}+6}{2}}
A=\frac{1}{2}×\frac{x^{2}+x \sqrt{6}+x \sqrt{6}+6 }{2}
A=\frac{x^{2}+x \sqrt{6}+x \sqrt{6}+6 }{4}
8 0
3 years ago
i a stoc kcar model is built to scale of 1 cm : 2.5 ft and the model measures 7.7 cm in length, what will be the length of actua
Oksanka [162]

Answer:

19.25 ft

Step-by-step explanation:

for every one cm the actual car is 2.5 feet. therfore it would be 7.7 times 2.5 which equals 19.25

3 0
2 years ago
Which properties justify the steps taken to solve the system?
max2010maxim [7]

Answer:

Just took it!

Step-by-step explanation:

6 0
3 years ago
Write the equation of the line in slope-intercept form
aniked [119]
Equation in slope intercept form: y= -1/2x + 3
5 0
3 years ago
write the following using algebraic notation, using the letter x for any unknown numbers: I think of a number,subtract four then
kkurt [141]

Answer:

Step-by-step explanation:

Let the number be x

Therefore the expression is (x-4)/3

Hope this helps

Plz mark it as brainliest!!!!!

8 0
3 years ago
Read 2 more answers
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