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alexandr402 [8]
2 years ago
10

Find the unknown numbers in the description. Three times a number is between -18 and 18. The solution set is

Mathematics
1 answer:
OlgaM077 [116]2 years ago
8 0
So 3 times a number is between -18 and 18
between means it cannot be -18 or 18 so
3 times x=3x
x=unknown
3x
< less than
>greater than

if it is between -18 and 18 then the number is >-18 and <18 so
-18<3x and
18>3x
divide both equations by 3
-6<x
6>x
combine
-6<x<6
solution set=(x|-6<x<6)
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The ratio of red balloons to blue balloons at a party is 4 to 9. If there are 20 red balloons, how many blue balloons are there?
STALIN [3.7K]

Answer:

Step-by-step explanation:

4/9 to 20/x

cross multiply and divide to get your answer

4     20

9     x

4x=180

x=45

5 0
2 years ago
What value, written as a decimal, should Lena use as the common ratio?
inn [45]

Answer:

an=1*2.5^(n-1)

=2.5^(n-1)

Step-by-step explanation:

Complete question below:

What value, written as a decimal, should Lena use as the common ratio? Lena is asked to write an explicit formula for the graphed geometric sequence. On a coordinate plane, 3 points are plotted. The points are (1, 1), (2, 2.5), (3, 6.25).

Solution

Point (1, 1), (2, 2.5), (3, 6.25).

a=1

ar=2.5

ar^2=6.25

From ar and ar^2

r=6.25/2.5

=2.5

r=2.5

an=ar^(n-1)

Therefore, the explicit formula is

an=1*2.5^(n-1)

=2.5^(n-1)

7 0
2 years ago
(English to algebra) twice the difference of w less than five
denpristay [2]

i believe its 2(5-w)

5 0
2 years ago
Read 2 more answers
Ginger buys lunch at school every day. She always gets
shepuryov [24]

Answer:

The estimated probability that Ginger will eat a a pizza everyday of the week is;

D. 8/10 = 80%

Step-by-step explanation:

The given parameters are;

The frequency with which Ginger buys launch = Everyday

The percentage of the time the cafeteria has pizza out = 80%

The outcome of 0 and 1 = No pizza available

The outcome of 2, 3, 4, 5, 6, 7, 8, and 9 = Pizza available

Therefore, we have the;

Group number  {}                          Percentage of time pizza available

1                     {}                          80%

2                     {}                          80%

3                     {}                          80%

4                     {}                          80%

5                     {}                          40%

6                     {}                          100%

7                     {}                          80%

8                     {}                          100%

9                     {}                          80%

10                     {}                          80%

Therefore, the sum of the percentages outcome the days Ginger eats pizza = 0.8 + 0.8 + 0.8 + 0.8 + 0.4 + 1 + 0.8 + 1 + 0.8 + 0.8 = 8

The number of runs of simulation = 10 runs

The estimated probability that Ginger will eat a a pizza everyday of the week = (The sum of the percentages outcome the days Ginger eats pizza)/(The number of runs of simulation)

∴ The estimated probability that Ginger will eat a a pizza everyday of the week = 8/10

6 0
3 years ago
Read 2 more answers
HELPP PLEASE!!! SOLVE AND SHOW ALL WORK!!!
ruslelena [56]

Answer:

Step-by-step explanation:

4x+6+3x+8=28

combine like terms

7x+14=28

subtract 14

7x=14

divide

x=2

if you plug it in you get-

4(2)+6+3(2)+8=

8+6+6+8=12+16=28

thats how you can check. if you want me to explain more i can totally help

4 0
3 years ago
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