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kumpel [21]
3 years ago
15

( please explain it to me!) 7. Wei's mark on a test was 39. This

Mathematics
1 answer:
Maurinko [17]3 years ago
8 0

Answer:

65

Step-by-step explanation:

Since 39 is equal to 60%, and 60% is also equal to 60/100, then 39/x (x is the total we are solving for) is equal to 60/100.

Cross multiply so 39/x = 60/100

39*100 = 60x

3900 = 60x (divide both sides by 60)

65 = x

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Sorry for the iready lesson spam but i suck at geometry :
Brums [2.3K]

Answer:

x = 63; y = 27

Step-by-step explanation:

x + 117 = 180

x = 180 - 117

x = 63

x + y = 90

63 + y = 90

y = 90 - 63

y = 27

Bam! UwU

Lol Hope this helps !

6 0
3 years ago
Read 2 more answers
1. Find a 10 in the sequence given by an = -5 + 9(n − 1).<br> 010 =
hjlf

Answer:

76

Step-by-step explanation:

a10=-5+9(10-1)=-5+9×9=-5+81=76

7 0
3 years ago
Chemist has an empty cylinder with a height of 30 cm and a cone shaped flask. The flask is the same height and a base that is th
Nookie1986 [14]
It fills the cylinder up to 10 cm.

The volume of a cylinder is given by the formula
V = πr²h, where r is the radius of the base and h is the height of the cylinder.

The volume of a cone is given by the formula 
V = 1/3πr²h, where r is the radius of the base and h is the height of the cylinder.

Since the base of the flask and the cylinder are the same, this means r is the same number in both formulas.
Since the height of the flask and the cylinder are the same, this means h is the same number in both formulas.

This means that the only difference in the formulas is that the formula for the cone flask is 1/3 the formula for the cylinder.

The water that fills the cone flask will fill 1/3 of the cylinder; 1/3(30) = 10 
3 0
4 years ago
Read 2 more answers
(3x+5)(2x-3)=6x^2 +x-15
Katena32 [7]

Answer:

Infinite solutions

Step-by-step explanation:

(3x + 5)(2x - 3) =  6x^2 + x - 15

6x^2 + x - 15 = 6x^2 + x - 15

Left side = right side so there are infinite solutions

3 0
4 years ago
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Your sister is considering two different shapes for her garden. 1 is a square with side lengths of 3.5 M and the other is a circ
Likurg_2 [28]

Answer:

12.25 M^2(square) 12.56 M^2(circle)

Step-by-step explanation:

side of square= 3.5 M

area of square garden= side*side

=3.5*3.5

=12.25 M^2

Diameter of circle=4 M

Radius of circle=Diameter/2

=4/2

=2

Area of circle garden= 2(pi)r^2(where r is radius)

=3.14*2*2

=12.56 M^2

6 0
3 years ago
Read 2 more answers
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