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netineya [11]
3 years ago
9

Last Thursday was costume day at Wayne's school. 20 out of the 100 students at the school wore a costume. What percentage of the

students wore a costume?
Mathematics
1 answer:
Paraphin [41]3 years ago
8 0

Answer:

20 percent or 2/10

Step-by-step explanation:

to make into a percentage it would be easy because of it being out of 100 so make the 100 a percentage and then see how much the 20 would be it would be the same 20/100 only in percentage form so 20 percent

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Does anybody know how to do question 2 please show working out
Natalija [7]
2a.
Since BC = 10m and M is the midpoint, we can find CM by : 10÷2 = 5m
So, CM = 5m

2b. Now, you have the base ( 5m) & hypotenuse (13m). Pythagoras' Theorem:

c {}^{2}  =  {a}^{2}  +  {b}^{2}
Where c is the hypotenuse, a & b are sides.

{13}^{2}  =  {5}^{2}  + b {}^{2}  \\  {5}^{2}  +  {b}^{2}  = 13 {}^{2}  \\  {b}^{2}  = 13 {}^{2}  -  {5}^{2}  \\ b =  \sqrt{144}  \\ b = 12
b here refers to the height.

2c.
Area of a right-angled triangle =
\frac{base \times height}{2}
So,
\frac{10 \times 12}{2} \\  = 60 {m}^{2}
7 0
3 years ago
Read 2 more answers
Marty is 54 years old, and his niece is 6. How many times older is Marty than his niece? Choose the answer that has the correct
vladimir1956 [14]

Answer: A) 6x = 54; x = 9 times older

Step-by-step explanation:

9 x 6 = 54

8 0
3 years ago
Y=-x+7 y=2x+1 solve using equations
777dan777 [17]

Answer:

x=6,y=13

Step-by-step explanation:

Eliminate the equal sides of each equation and combine.

x+7=2x+1

Solve x+7=2x+1

x=6

Evaluate yy when x=6

y=13

The solution to the system is the complete set of ordered pairs that are valid solutions.

(6,13)

The result can be shown in multiple forms.

Point Form:

(6,13)

Equation Form:

x=6,y=13

3 0
3 years ago
Solve<br> 13^x+2=5<br> having a bit of trouble
-Dominant- [34]
<em>Solve: </em>13^{x} + 2 = 5

Start by isolating the x-variable as much as you can:
13^{x} = 5 - 2 = 3
13^{x} = 3

Now, if we take the log with base 13 of both sides, then the left hand side will cancel out really easily. This is based on the concept of inverse operations. For example, when we take the square of a square root, we get our initial value. This is because the two operations are inverses of each other, and basically undoes each other.

Logarithms and exponentials are the inverse operations of each other. If we want to extrapolate the power of an exponential, we take the logarithmic function of it, and vice versa.

In this case, we are saying what power of '13' will produce us with 13ˣ, and the only answer will be x itself.

log_{13}(13^{x}) = log_{13}(3)
x = log_{13}(3)
3 0
4 years ago
Sorry for the blurry pic but i need help im pretty sure its undefined but want a double check
lawyer [7]
The slope is 0 and the equation of the line is y= -2.

3 0
3 years ago
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