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ratelena [41]
3 years ago
14

there are 45 students In a class if 60% of them are girls and 40% of them are boys find the number of girls and boys​

Mathematics
1 answer:
Lapatulllka [165]3 years ago
3 0

Answer:

27 girls and 18 boys

Step-by-step explanation:

you need to divide the 45 pupils into 60 and 40 percent to

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Given the line 2x - 3y - 5 = 0, find the slope of a line that is perpendicular to this line.
Tasya [4]

Answer:  

The slope of a line that is perpendicular to the given line is -\frac{3}{2}

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

y=mx+b

Where "m" is the slope of the line and "b" is the y-intercept.

Solve for "y" from the equation of the line 2x - 3y - 5 = 0:

2x - 3y - 5 = 0\\\\-3y=-2x+5\\\\y=\frac{-2}{-3}x+\frac{5}{-3}\\\\y=\frac{2}{3}x-\frac{5}{3}

You can observe that the slope of this line is:

m=\frac{2}{3}

By definition, the slopes of perpendicular lines are negative reciprocal, then, the slope of a line that is perpendicular to the give line, is

m=-\frac{3}{2}

5 0
3 years ago
A tree casts a shadow that is 18 feet, in length. If the angle of elevation is 28, which of the following best represents the he
Liono4ka [1.6K]
The first step for this problem should always be to draw out the triangle so that you can right down the angles and side lengths. Afterward, you can use SOHCAHTOA to find the height of the tree. You would use tangent. The equation you would use is tan(28°)x/18. After solving for x, you will find the answer which is approximately 9.57 feet.

Hope this helped :)
4 0
3 years ago
Karen buys 2 packages of printer paper for $5.79 each, a box of pens for $9.25. a box of paperclips for $2.29, and a
andreyandreev [35.5K]

Answer: I think its $37.84625 according to the working shown :)

Step-by-step explanation:

cost of paper= $5.79, hence 2 is 2 x 5.79= 11.58

pens= $9.25

paperclips= $2.29

calendar= $12.50

Total= 11.58+9.25+2.29+12.50= 35.62

6.25% sales tax on total purchase= 6.25/100 x 35.62= $2.22625

Adding the sales tax: 35.62+2.22625‬= $37.84625‬‬

3 0
3 years ago
Read 2 more answers
What is the answer??
liq [111]

Answer:

the 4th one

I guess

if this is the wrong answer then let me know

6 0
3 years ago
Read 2 more answers
How do I solve this ?
Burka [1]
Your answer would be 
8y^7
-------
3X^3
5 0
3 years ago
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