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Gnesinka [82]
2 years ago
5

A developer has 7 1/2 acres of land to build houses on. If each house is to be built on -1/4 acre plot, how many houses can he b

uild?
a 3

b 5

c 30

d 35
Mathematics
1 answer:
mel-nik [20]2 years ago
6 0
It’s either A.3 or C.30
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Seven bags of peanuts and 3 sandwiches cost 22. Three bags of peanuts and 1 sandwiche cost 8. The cost of 1 bag of peanuts is.on
NISA [10]
Replace the informations you don't know with letters.

x = number of bags
y = number of sandwiches

7x + 3y = 22
3x + y = 8

Then solve the equations.
First, isolate the y in the second one like this :
y = 8 - 3x

then replace the y in the first equation with its worth from the second equation :

7x + 3(8 - 3x) = 22

solve for x, then replace the value in the equations to get the value of y
4 0
3 years ago
Solve the following inequality.<br><br> IMAGE ATTACHED
kotykmax [81]
The answer is D.

First, separate the compound equality into 2
1st -3 (x-4) greater than/ equal to 21
2nd -3( x-4) < 30

Second, solve the inequality for x
1st x less than/ equal to -3
2nd x > -6

Third, find the intersection
D. -6 < x (less than/equal) to -3

I hope this helped, and if you don’t mind, giving me brainiest!

6 0
3 years ago
I Need more help plz I need help help help
sergij07 [2.7K]

Answer:

1.715 kilometers

Step-by-step explanation:

If you know it travels 343 meters per second for 5 seconds, you simply multiply 343 by 5 to get 1,715. There is 1000 meters in a kilometer, so you divide by 1000 to get 1.715 kilometers.

6 0
3 years ago
Read 2 more answers
A hair salon in Cambridge, Massachusetts, reports that on seven randomly selected weekdays, the number of customers who visited
morpeh [17]

Answer:

a: 28 < µ < 34

Step-by-step explanation:

We need the mean, var, and standard deviation for the data set.  See first attached photo for calculations for these...

We get a mean of 222/7 = 31.7143

and a sample standard deviation of: 4.3079

We can now construct our confidence interval.  See the second attached photo for the construction steps.

They want a 90% confidence interval.  Our sample size is 7, so since n < 30, we will use a t-score.  Look up the value under the 10% area in 2 tails column, and degree of freedom is 6 (degree of freedom is always 1 less than sample size for confidence intervals when n < 30)

The t-value is: 1.943

We rounded down to the nearest person in the interval because we don't want to over estimate.  It said 28.55, so more than 28 but not quite 29, so if we use 29 as the lower limit, we could over estimate.  It's better to use 28 and underestimate a little when considering customer flow.

5 0
3 years ago
A factory produced a batch of handheld video games, but 4% of the games were found to be defective. If the batch had 250 games i
Ghella [55]
250 x 96% (good games) = 240
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3 years ago
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