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elixir [45]
3 years ago
9

Wilma and Betty are playing a number game. Wilma tells Betty, "I'm thinking of a number between 1 and 10. If I take the number a

nd add 4 to it and then multiply that by 3, I get 30." What number is Wilma thinking of?
Mathematics
1 answer:
abruzzese [7]3 years ago
4 0
Just work this problem out backwards. First write out an equation.
(x+4)•3=30

Now solve :

(x+4)•3=30

3x+12=30
-12   -12

3x=18
/3   /3

x=6

Your answer is 6!

Hoped I helped!
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3 0
2 years ago
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What rule would you allow to test weather (x,y) is on line l
n200080 [17]

Answer:

Step-by-step explanation:

If a point (x, y) lies on a straight line, coordinates of the point will satisfy the equation.

Slope of a line passing through two points C(4, 5) and D(8, 10),

m = \frac{y_2-y_1}{x_2-x_1}

m = \frac{10-5}{8-4}

m = \frac{5}{4}

Equation of the line passing through C(4, 5) and slope m = \frac{5}{4}

y - y' = m(x - x')

y - 5 = \frac{5}{4}(x-4)

y = \frac{5}{4}x-5+5

y = \frac{5}{4}x

If point B(4, 0) lies on the line CD,

0 = \frac{5}{4}(4)

0 = 5

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8 0
3 years ago
Write the ratio as a fraction in simplest form. The ratio for 18 girls to 27 boys as a fraction is .
love history [14]

Answer:

2/3

Step-by-step explanation:

Reduce the fraction 18/27 into its lowest terms

since both 18 and 27 are divisible by 9, divide both terms by 9

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18/27 reduced to lowest terms is 2/3

6 0
3 years ago
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Advocard [28]
The first thing we are going to do to solve the problem is to define what associative property is:
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 We observe that both members of equality are identical, but written in different ways.
 Answer:
 B) (x + 3) + 7 = x + (3 + 7)
5 0
3 years ago
PLEASE HELP ME <br> WILL AWARD BRAINLIEST
mixas84 [53]

Answer:

I think the answer is b

Step-by-step explanation:

there are the same number of squares in both shapes.

8 0
3 years ago
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