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galben [10]
3 years ago
6

the ratios of girls to boys in a student basketball league is 5:6. juan says that there must be exactly 11 students in the leagu

e. is juans statement correct
Mathematics
2 answers:
Alex787 [66]3 years ago
8 0

Answer:

False

Step-by-step explanation:

girls : boys : total

5       : 6      :11

Multiply each term by 2

10:      12     :22

Ratio of girls to boys

10:12

Divide by 2

5:6

The ratio of girls to boys is still 5:6  but the total students is 22

zaharov [31]3 years ago
5 0

\bf \cfrac{5x}{6x}\implies \cfrac{5}{6}~~ratio~\hfill \stackrel{x=1}{\cfrac{5\cdot 1}{6\cdot 1}}\implies \cfrac{5}{6} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{x=20}{\cfrac{5\cdot 20}{6\cdot 20}}\implies \cfrac{100}{120}\implies \cfrac{5}{6}~\hfill \stackrel{x=100000}{\cfrac{5\cdot 100000}{6\cdot 100000}}\implies \cfrac{500000}{600000}\implies \cfrac{5}{6}

yes, he's correct, IF our multiplying value of "x" is 1, however, a ratio of 5/6 is also true for 100/120 or 500000/600000, and any other value up to infinity for that matter.

so it could be 11, or it could be much more.

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Alex is trying to run a certain number of miles by the end of the month Alex is 40% of the way to achieving her goal and she alr
docker41 [41]

Answer:

30 miles

Step-by-step explanation:

Given that:

Alex has some target to run a certain number of miles by the end of the month.

Goal already achieved = 40% of the total goal

Number of miles already run by Alex = 12 miles

To find:

Number of miles that Alex is trying to run by the end of month?

Solution:

We have to find nothing but the goal of Alex here.

Let the number of miles that Alex is trying to run by the end of the month = x miles

As per question statement:

40% of total number of miles to be run = 12 miles

OR

\dfrac{40}{100}\times x = 12\\\Rightarrow 40x=12\times 100\\\Rightarrow x = \dfrac{1200}{40}\\\Rightarrow \bold{x = 30\ miles}

Total number of miles that Alex is trying to run by the end of the month = <em>30 miles</em>

4 0
3 years ago
Rewrite the expression in terms of the given function 1/1-sinx - sinx/1+sinx
Feliz [49]
Your question seems a bit incomplete, but for starters you can write

\dfrac1{1-\sin x}-\dfrac{\sin x}{1+\sin x}=\dfrac{1+\sin x}{(1-\sin x)(1+\sin x)}-\dfrac{\sin x(1-\sin x)}{(1+\sin x)(1-\sin x)}=\dfrac{1+\sin x-\sin x(1-\sin x)}{(1-\sin x)(1+\sin x)}

Expanding where necessary, recalling that (1-\sin x)(1+\sin x)=1-\sin^2x=\cos^2x, you have

\dfrac{1+\sin x-\sin x(1-\sin x)}{(1-\sin x)(1+\sin x)}=\dfrac{1+\sin x-\sin x+\sin^2x}{\cos^2x}=\dfrac{1+\sin^2x}{\cos^2x}

and you can stop there, or continue to rewrite in terms of the reciprocal functions,

\dfrac{1+\sin^2x}{\cos^2x}=\sec^2x+\tan^2x

Now, since 1+\tan^2x=\sec^2x, the final form could also take

\sec^2x+\tan^2x=\sec^2x+(\sec^2x-1)=2\sec^2x-1

or

\sec^2x+\tan^2x=(1+\tan^2x)+\tan^2x=1+2\tan^2x
7 0
3 years ago
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blagie [28]

Answer:

Number of 1-cm cube 24. Volume of solid 24 cm^2

Step-by-step explanation:

3 0
3 years ago
Two angles are vertical angles. One is labeled 2x. The other angle is labeled (x+30). Find the value of x.
NeX [460]

2x=x+30

-x    -x

x=30

The value of x is 30

5 0
3 years ago
The length of a rectangle is represented by (2x2−5x+5)cm and the width is represented by (x2+4x−3)cm. What is the representation
Katarina [22]

Answer: 6x^2-2x+4

Step-by-step explanation:

Given

The length of a rectangle is given by

l=2x^2-5x+5

and the breadth is given by

w=x^2+4x-3

Perimeter is the sum of the sides of rectangle

\therefore \text{Perimeter P= }2(2x^2-5x+5+x^2+4x-3)\\\Rightarrow P=2(3x^2-5x+4x+5-3)\\\Rightarrow P=2(3x^2-x+2)\\\Rightarrow P=6x^2-2x+4

Thus, the perimeter is given by 6x^2-2x+4.

7 0
3 years ago
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