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vodomira [7]
4 years ago
14

Choose the correct product of (7x − 3)(7x + 3).

Mathematics
2 answers:
Lyrx [107]4 years ago
8 0

Answer:

Product of the expression is 49x² - 9.

Step-by-step explanation:

We have to find the product of (7x - 3)(7x + 3).

As we know the formula (a -b)(a + b) = a² - b²

So we replace the values of a = 7x and b = 3

Then (7x - 3)(7x + 3) = [(7x)²- (3)²]

= 49x² - 9

Therefore, product of the expression is 49x² - 9.

Anettt [7]4 years ago
3 0
(49x²+21x-21x-9)
Answer:  49x²-9

hope this helps
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Mark spent a total of ₱60 in 6 days by spending half the amount he spent the previous day. What was the amount he spent on the f
motikmotik

Answer: 30.48

Step-by-step explanation:

Sum the series of 30.48 + (1/2)(30.48)+ (1/4)(30.48)+(1/8)(30.48)+(1/16)(30.48)+(1/32)(30.48)

Or use an Excel spreadsheet

6 0
3 years ago
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Solve the following system of equations by graphing and select the correct answer below:
JulijaS [17]

Answer: option c

Step-by-step explanation:

Find the x-intercept and y-intercept of each line.

To find the x-intercept, substitute y=0 into the equation and solve for "x".

To find the y-intercept, substitute x=0 into the equation and solve for "y".

- For the first equation:

x-intercept

4x + 3y = 29\\\\4x + 3(0)= 29\\\\4x=29\\\\x=\frac{29}{4}\\\\x=7.25

y-intercept

4x + 3y = 29\\\\4(0) + 3y = 29\\\\3y=29\\\\y=\frac{29}{3}\\\\y=9.66

Graph a line that passes through the points (7.25, 0) and (0, 9.66)

- For the second equation:

x-intercept

2x - 3y = 1 \\\\2x - 3(0) = 1 \\\\2x=1\\\\x=0.5

y-intercept

2x - 3y = 1\\\\2(0) - 3y = 1\\\\-3y=1\\\\y=-0.33

Graph a line that passes through the points (0.5, 0) and (0, -0.33)

Observe the graph attached. You can see that point of intersection of the lines is (5,3); then this is the solution of the system. Therefore:

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7 0
4 years ago
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- Monica goes for a 60 minute bike ride each day in the summer. Let a rep
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Answer:

m = 60a

a = Independent Variable

m = Dependent Variable.

For a = 1 day, m = 60 minutes

For a = 2 days, m = 120 minutes

For a = 3 days, m = 180 minutes

For a = 4 days, m = 240 minutes

For a = 5 days, m = 300 minutes

For a = 6 days, m = 360 minutes

For a = 7 days, m = 420 minutes

Step-by-step explanation:

Monica goes for a 60-minute bike ride each day in the summer.

If a represents the number of days Monica rides her bike and m represents the total number of minutes she spends riding her bike, then a represents the independent variable and m represents the dependent variable.

The relation between a and m can be written as an equation, m = 60a.

Now, for a = 1 day, m = 60 minutes

For a = 2 days, m = 60 × 2 = 120 minutes

For a = 3 days, m = 60 × 3 = 180 minutes

For a = 4 days, m = 60 × 4 = 240 minutes

For a = 5 days, m = 60 × 5 = 300 minutes

For a = 6 days, m = 60 × 6 = 360 minutes

For a = 7 days, m = 60 × 7 = 420 minutes

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3 0
3 years ago
Have you ever devised a way to solve a problem? How?
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Answer:

What kind of problem?

Step-by-step explanation:

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3 years ago
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Answer:

\huge \frac{4}{9}

Step-by-step explanation:

Given points are: (-4,2) and (5,6)

slope =  \frac{6 - 2}{5 - ( - 4)}  =  \frac{4}{5 + 4}  =  \frac{4}{9}  \\

7 0
3 years ago
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