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Setler79 [48]
3 years ago
10

Timothy bought concrete mix for several projects. He used

Mathematics
2 answers:
Hunter-Best [27]3 years ago
8 0

Answer:

The required model is 3.5y+2.25y=345

60 pounds of concrete each bag make.

Step-by-step explanation:

Consider the provided information.

Let the number of concrete bags are used is represented by y.

Part (A)

3.5 bags of concrete mix for a new set of stairs and 2.25 bags  of concrete mix for a garden wall.

This can be written as:

3.5y+2.25y

Timothy mixed  345 pounds of concrete in all.

Therefore, 3.5y+2.25y=345

Hence, the required model is 3.5y+2.25y=345

Part (B)  Solve for y. How many pounds of concrete does each bag make?

Consider the above equation.

3.5y+2.25y=345

Solve the equation for y as shown.

Add the like terms.

5.75y=345

Divide both the sides by 5.75

y=60

Hence, 60 pounds of concrete each bag make.

stira [4]3 years ago
4 0
3.5y+2.25y=345

5.75y=345

60

Each bag makes 60 lbs of concrete
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A car moving at a constant speed travels 88 feet in 2 seconds. Use a proportion to find how many feet it travels in one minute
Yuki888 [10]
88 feet in 2 seconds
how many feet in 1 minute?
1 minute is 60 seconds

so, we can write a proportion and solve
feet/ seconds = feet/seconds
88/2 = x / 60
cross multiply
(88 * 60 ) = 2 * x
5280 = 2x
divide both sides by 2
2640 = x

To check:
88/2 =?= 2640 / 60
44 = 44

So the car travels 2640 feet in 60 seconds, or 1 minute.

(btw just in case you wanted to know also, 2640 feet is equal to 0.5 of a mile, that car travels 0.5 miles in 1 minute)

Hope this helps
3 0
3 years ago
7.
Serjik [45]

Answer:

Probability that a customer pays the bill by mail, given that the customer is female is 0.20.

Step-by-step explanation:

The complete question is:

                               Online                             By Mail            Total

             Male             12                                      8                   20

           Female           24                                     6                   30      

             Total             36                                     14                  50    

A utility company asked 50 of its customers whether they pay their bills online or by mail. What is the probability that a customer pays the bill by mail, given that the customer is female.

Probability that a customer pays the bill by mail, given that the customer is female is given by = P(Pays bill by mail / Customer is female)

\frac{6}{50}P(Pays bill by mail/Customer is female) = \frac{P(\text{Pays bill by Mail}\bigcap \text{ Customer is Female})}{P(\text{ Customer is Female})}

Now, Probability that customer is female =  \frac{30}{50}

Also, Probability that customer pays bill by mail and is female =   \frac{6}{50}

So, Required probability =  \frac{\frac{6}{50} }{\frac{30}{50} }

                                         =  \frac{6}{50}\times \frac{50}{30}

                                         =  \frac{1}{5}   =  0.20

Hence, probability that a customer pays the bill by mail, given that the customer is female is 0.20.

6 0
3 years ago
Oops I meant: what is -7 + 9 = x +1
Ivanshal [37]

Hello!

-7 + 9 = x + 1

2 = x + 1

2 - 1 = x

1 = x

I hope this helps you! Have a lovely day!

- Mal

7 0
3 years ago
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Svetradugi [14.3K]
The answer is g4 -2 hope this helps
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4 years ago
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Can someone help me with this math homework please!
marin [14]

Answer:

\mathfrak {last \:option }

\mathfrak\blue{ {option \: 2} }

Step-by-step explanation:

x intercept of a function is the point where it's graph intersects the x axis.

or

simply that value x, where the value of y is 0.

since at x = 2; f(x) =0 that point <u>(2, 0)</u> is the x intercept of the function.

5 0
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