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Pie
3 years ago
5

Some friends decide to go to the aquarium together. Each person pays $7.50 to get in. They spend a total of $40 for the shark ex

hibit. The total cost is $70. Solve 7.5x+40=70 to find how many people went to the aquarium.
Mathematics
1 answer:
murzikaleks [220]3 years ago
7 0

Answer:

4 people went to the aquarium

Step-by-step explanation:

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hey, do any of you guys know how to plot functions on a graph. You know like f(X) and g(X)? I find it really hard and also do yo
Tpy6a [65]
It helps if you have an example, like f(x) = 2x+3
What you typically do, is:

- draw xy axis, label them (ie., 1,2,3,4 along both axes)
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- plot the calculated values as points. The calculated f(x) is your y value.
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3 0
3 years ago
A sandwich shop serves 4 ounces of meat and 3 ounces of cheese on each sandwich. After making sandwiches for an hour, the shop o
mote1985 [20]

Answer:

7 oz, 13 sandwiches, 22.75 oz, and  30.33 oz.

Step-by-step explanation:

4 0
3 years ago
A toy manufacturer wants to know how many new toys children buy each year. A sample of 601 children was taken to study their pur
Lilit [14]

Answer:

The confidence interval is 6.6<μ<6.8.

Step-by-step explanation:

We have:

Number of observations = 601

Mean = 6.7

Standard deviation σ = 1.5

The z-score for a 95% confidence interval is 1.96.

The limits of the confidence interval can be calculated as

X \pm z*\frac{\sigma}{\sqrt{n}}\\\\LL=X-z*\frac{\sigma}{\sqrt{n}}=6.7-1.96*\frac{1.5}{\sqrt{601} } =6.7-0.1199=6.6\\\\UL=X+z*\frac{\sigma}{\sqrt{n}}=6.7+1.96*\frac{1.5}{\sqrt{601} } =6.7+0.1199=6.8

The confidence interval is 6.6<μ<6.8.

7 0
3 years ago
Y =3x+2 is the equation of a straight line graph.where does it cross the y-axis
neonofarm [45]
Cross the y-axis in x=0
therfore:
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solution: P(0,2).
7 0
3 years ago
Can you please help me with this problem!!
Black_prince [1.1K]

Answer:

.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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