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3 years ago

*expression help asap.

Mathematics

1 answer:

Thepotemich [5.8K]3 years ago

6 0

Answer:

(x+11)(x-11)

Step-by-step explanation:

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A lot measuring 240 ft by 400 ft is selling for $400 a front foot. what is the price

Elena-2011 [213]

A lot measuring 240' by 400' is selling for $400 a front foot. What is the price? a) $1,600 b) $16,000 c) $72,000

6 0

3 years ago

A city employee paints curbs in parking lots and replaces road signs. It takes 0.5 hour to paint a parking lot curb and 2.5 hour

Genrish500 [490]

Question is incomplete. Here is the complete question.

A city employee paints curbs iin parking lots and replaces road signs. It takes 0.5 hour to paint a parking lot curb and 2.5 hours to replace a road sign. The function below can be used to find c, the number of parking lot curbs the employee paints when he replaces r road signs in a 40-hour workweek.

$c=\frac{40-2.5r}{0.5}$

If the employee painted 20 curbs in one week, how many road signs did he replace that week?

a) 20 b) 30 c) 0 d) 12

Answer: d) 12

Step-by-step explanation: In one week, the employee painted 20 curbs.

c is the number of curbs painted in one week, so: c = 20

$20=\frac{40-2.5r}{0.5}$

$40-2.5r=20*0.5$

$-2.5r=10-40$

$-2.5r=-30$

$r=\frac{-30}{-2.5}$

r = 12

In one week, the employee replaced 12 road signs.

5 0

4 years ago

Plz and This there’s is more because it’s an assessment

Nitella [24]

Answer:

33 students

Step-by-step explanation:

Since there aren’t going to be fractions of people, you can just count up using the whole numbers in the ratio (4 on the left, 7 on the right) and then check if the sum is between 24 and 40.

4:7 = 11 students (not enough)

8:14 = 22 students (not enough)

12:21 = 33 students (fits criteria)

12 boys, 21 girls, for a total of 33 students.

8 0

3 years ago

A fitness center runs a contest for customers who enroll in its annual membership plan. The customers are allowed to draw a coup

Alchen [17]

There are 35 coupons in the jar.
The probability to choose coupon for 1 month of extended membership is $p(A)= \frac{20}{35} = \frac{4}{7}$ .
The probability to choose coupon for 1.5 months of extended membership is $p(B)= \frac{10}{35} = \frac{2}{7}$ .

Answer: With probability $\frac{4}{7}$ a customer will get 30 days extended membership, 
with probability $\frac{2}{7}$ a customer will get 450 days extended membership,
with probability $\frac{1}{7}$ a customer will get 60 days extended membership.
The probability to choose coupon for 1 month of extended membership is $p(C)= \frac{5}{35} = \frac{1}{7}$ .
Together P(A)+P(B)+p(C)=1.

5 0

4 years ago

Are these parallelograms or not?

Scrat [10]

Can’t see what you’re talking about

8 0

4 years ago

*expression help asap.​

*expression help asap.