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Softa [21]
3 years ago
15

(08.06) A school fair ticket costs $8 per adult and $1 per child. On a certain day, the total number of adults (a) and children

(c) who went to the fair was 30, and the total money collected was $100. Which of the following options represents the number of children and the number of adults who attended the fair that day, and the pair of equations that can be solved to find the numbers?
Mathematics
1 answer:
posledela3 years ago
3 0
Call the number of adults a and the number of children c. We then know:
a+c=30
and using the given costs:
8a+c=100
thus:
c=30-a
8a+30-a=100
7a=70
a=10
by backsubstitution:
a+c=30
10+c=30
c=20

10 Adults and 20 Children
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Find the volume of each square pyramid given its slant height. Round to the nearest tenth. It looks like a normal pyramid with a
Luden [163]

Answer:

1.344 cubic units

Step-by-step explanation:

Given data

Base edge a= 1.2

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substitute

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V= 1.44*2.8/3

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5 0
2 years ago
If the level of significance (alpha) is 0.05, it means that the probability of rejecting the null hypothesis, when it is false,
Kaylis [27]

Answer: The probability of rejecting the null hypothesis, when it is true, is 5%.

Step-by-step explanation:

We know that the level of significance ( denoted as \alpha ) is generally the probability of rejecting the null hypothesis when it is true.

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i.e. The probability of rejecting the null hypothesis when it is true= 0.05

In percent : 0.05=5\%

Hence, the correct option is : The probability of rejecting the null hypothesis when it is true is 5%.

4 0
3 years ago
If x = -5, then |x - 7| = <br> A: -12 <br> B: 2 <br> C: 12 <br> D: -2
SOVA2 [1]
x=-5\\\\|(-5)-7| = \\(-5)-7=-12\\\\Therefore, \\\boxed{|(-5)-7|=12}

Remember that there cannot be a negative number in an absolute value.<span />
3 0
3 years ago
Read 2 more answers
Please help and thank you
Flura [38]

Answer:

B

Step-by-step explanation:

|x + 2| + 5 > 8

x+ 2 + 5 > 8

x + 7 > 8

x > 1

or

-(x + 2) + 5 > 8

-x -2 > 3

-x > 5

x < -5

answer: B

x < - 5 or x > 1

7 0
3 years ago
Each of 5 friends got a full box of snacks and an extra 6 snacks. Write an equation to show how many snacks are in all those box
loris [4]
I think an equation for this could be 5x+6=y
This can be explained as x representing how much the five friends got and y equaling the total. Hope this helps!
8 0
2 years ago
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