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tresset_1 [31]
3 years ago
7

Will mark branliest if gotten right!

Mathematics
1 answer:
NemiM [27]3 years ago
7 0

Answer:

angle 3 and angle 5

Step-by-step explanation:

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Marizza181 [45]

a) 24% said they wanted to learn french.

To find total number of students surveyed divide the number of students that want to learn French by the percentage:

12 / 0.24 = 50

There were 50 students surveyed.


b) 36% wanted to learn Spanish, multiply 50 by 36%

50 * 0.36 = 18

18 students wanted to learn Spanish.

7 0
3 years ago
Read 2 more answers
Doreen schmidt is a chemist. She needs to prepare 36 ounces of a 10% shydrochloric acid solution. Find the amount of 18% solutio
emmainna [20.7K]
Total = 36oz
Amount of 18% solution = x
Amount of 9% solution = 36 - x

Using the fact that (amount of solution) * (percent HCl) = amount HCl we can set up an expression for the amount HCl in a mixture of 18% and 9% solutions with a total volume of 36oz.

Amount of HCl = x*0.18 + (36 - x)*0.09

If we divide this by the amount of solution we get percent HCl, and we have a target of 10% HCl. Now we have an equation to solve,

[x*0.18 + (36 - x)*0.09]/36 = 0.1

x*0.09 + 3.24 = 3.6

.09x = 0.36
x = 4

Therefore,
4 ounces of 18% HCl solution and 32 ounces of 9% HCl solution

Check:
[(4*.18) + (.09*32)]/36 = 0.1?
0.1 = 0.1   Yes.

5 0
3 years ago
Find the perimeter and area of the parallelogram. 
Debora [2.8K]

2·20 + 2·24 = 88

20·24·SIN(60°) = 415.7

3 0
3 years ago
State whether the equation is true, false, or an open sentence. 9 = 5 + 4
Molodets [167]

Answer:

This equation is true because when you flip it 5+4=9 it is the same. and 5+4=9

Step-by-step explanation:

9=5+4   5+4=9  

4 0
3 years ago
Read 2 more answers
Suppose y varies jointly as x and z. If y=15 when x=1/2 and z=6, what is the constant of variation?
Mashcka [7]

Answer:

y= 15

Step-by-step explanation:

Y= Kxz

y=6  x=1/2   z=6

15= K (1/2) (6)

15= K (3)

K= 5

SO

y= (5) (1/2) (6)

Y= 15

4 0
2 years ago
Read 2 more answers
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