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alexira [117]
3 years ago
6

4. Which statement is true about the expression 7(2x + 5)?

Mathematics
1 answer:
babunello [35]3 years ago
5 0
Answer: (C)

Explain:
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Please help and explain!!!!!
FinnZ [79.3K]

Let x be the amount of the 30% alloy and y the amount of the 60% alloy the metalworker will use. However much is used, the final alloy will have a mass of

x+y=100

kilograms. For each kg of the 30% alloy used, 0.3 kg is copper; similary, each kg of the 60% alloy contributes 0.6 kg, so that

0.3x+0.6y=0.54(x+y)=54

Now,

x+y=100\implies y=100-x

\implies0.3x+0.6(100-x)=54

\implies60-0.3x=54

\implies0.3x=6

\implies x=20

\implies y=100-20=80

6 0
4 years ago
Need help please and thanks
Dennis_Churaev [7]
1 parallelogram
2 parallelogram
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6 0
3 years ago
(Please help its due in 5 min!!!!)A study was designed to determine the relationship between driving speed and gas consumption f
S_A_V [24]
B. The independent variable is the driving speed, and the dependent variable is the gasoline consumption.

Gasoline consumption will either increase or decrease based on the driving speed of the car.

The weight of the car is not essential in determining the relationship between driving speed and gas consumption.

6 0
3 years ago
Read 2 more answers
Katie has 6500 in her savings account. If it earns 6% interest every month how much savings does she have in her account in over
svetlana [45]

Step-by-step explanation:

First, you recognize the algorithm for the equation: A=P(1+r)^n. This is the algorithm for interest. P is the amount of initial money (in this case, 6500), r is the interest rate (6%, or 0.06), and n is the number of times it is being compounded. Since half a year is given to me, 6 months is what I will be using, or just 6.

Next, plug in the numbers. The equation is now: A=6500(1+0.06)^6.

Now time to solve. First add what's in the parenthesis, and put it to the power of 6, for 6 months. Then multiply that amount to the initial dollar amount; 6500. This will leave you with 9,220.37.

3 0
4 years ago
Create a table for the values for the inverse relation.
wolverine [178]

Solution:

To determine the inverse of the function given, interchange the x value for the y value and vice versa

The table below give the inverse

7 0
1 year ago
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