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Mrrafil [7]
2 years ago
7

Before the clowns arrived, only 35% of the children wore happy faces. If 117 children did not wear happy faces, how many childre

n were there in all?
Mathematics
1 answer:
denis-greek [22]2 years ago
4 0

Answer:

180

Step-by-step explanation:

If 35% did not wear happy faces, then 100% -35% = 65% did wear happy faces.

Then we have ...

... 117 = 65% × (all children)

... 117/0.65 = all children = 180 . . . . . . divide by 65% = 65/100 = 0.65

There were 180 children in all.

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Jlenok [28]

Answer:

X should equal 65, sorry if I’m wrong

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.
Rzqust [24]

Answer:

a = 6 or 9

Step-by-step explanation:

The "a", "b", and "c" of the quadratic formula are the coefficients of a², a, and the constant term in the given equation:

... a = 2, b = -30, c = 108

Then the quadratic formula tells you the solutions are ...

... (-b ± √(b² -4ac))/(2a)

... = (-(-30) ± √((-30)² -4(2)(108)))/(2(2))

... = (30 ± √(900 -864))/4

... = (30 ± √36)/4

... = (30 ± 6)/4 = {24, 36}/4

... = {6, 9}

_____

The <em>a</em> variable should not be confused with the "a" that is used to name the coefficient of the square of the variable in the quadratic formula. If it is too confusing, rewrite one or the other. For example, you could write ...

... The solution to pa² +qa +r = 0 is ... a = (-q ± √(q²-4pr))/(2p)

where p=2, q=-30, r=108 in the given equation.

5 0
2 years ago
12x-39≤9 AND −4x+3&lt;−6
Elza [17]

Answer:

9/4<x≤4 or all real numbers

Step-by-step explanation:

I'm not sure what you are asking

4 0
3 years ago
How many 4-digit numbers can be made from the digits 2, 3, 4, 5, 6, 7 if no digit is repeated in the same number?
jonny [76]
THis equals the number of permutations of 4 from  6.

= 6P4  =  6! /  (6 - 4)!   = 6! / 2!  =  720/2  = 360 answer
8 0
3 years ago
Solve for x. 15x + 6 = 10x + 21 x = -5 x = 5 x = 3 x = 5
klio [65]
Move all the x terms to one side and solve for x. 15x-10x=21-6 : 5x/5=15/5 : x=3
4 0
3 years ago
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