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3 years ago

2-2 Skills Practice

Mathematics

1 answer:

Burka [1]3 years ago

4 0

I have no clue what any of this is

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3) 8p + 7q = 43 2 -7=-q how can I solve this with substitution?

Bess [88]

Answer:

p=1, q=5. (1, 5).

Step-by-step explanation:

8p+7q=43

2-7=-q

------------------

-q=-5

q=5

--------

8p+7(5)=43

8p+35=43

8p=43-35

8p=8

p=8/8=1

6 0

3 years ago

"find the equation of the line passing through the point (1,1) and perpendicular to the line y=5x-1 enter the exact answer. Use

arlik [135]

In this question, we have o find the equation of line passing through point (1,1) and is perpendicular to the line

$y = 5 x-1$

And slope of the given line is 5. And slopes of perpendicular lines are opposite and reciprocal of each other.

So slope of perpendicular line is

$m = - \frac{1}{5}$

Using slope intercept form, which is

$y=mx+b$

Substituting the values of x and y from the given point, and the value of m, we will get

$1= - \frac{1}{5} +b$

adding 1/5 to both sides

$1 + \frac{1}{5} = b
\\
b = \frac{6}{5}$

So the required equation of line is

$y = - \frac{1}{5} x + \frac{6}{5}$

8 0

4 years ago

Read 2 more answers

Solve the equation 4 sin (x +30°) = 2 for 0 < x < 365

tatuchka [14]

$4 \sin(x + 30) = 2 \\ \sin(x + 30 ) = \frac{2}{4} \\ \sin(x + 30) = \frac{1}{2} \\ \sin(x + 30) = \sin(30) \\ x + 30 = 30 \\ x = 30 - 30 \\ x = 0$

Hence, x = 0°, 180° and 360° Ans

3 0

3 years ago

An electronics store purchased a CD player at a wholesale price of 60$ and then sold it at a 40 percent discount off the origina

Ymorist [56]

Answer:

Option B is the answer.

Step-by-step explanation:

Given :

The cost price = $60 (this is the wholesale price)

Let the actual retail price be R.

40% discount on R = 0.6R (selling price of the product )

We know profit = selling price -cost price

$0.6R -60$ = 25% of 60

=> $0.6R -60 =15$

Solving for R now:

$0.6R=15+60$

$0.6R=75$

R = $125

We have to tell the profit/actual retail price percentage.

$\frac{15}{125} \times100=12$ %

So, the answer is 12%.

3 0

3 years ago

What is the value of 3 to the power 2 over 3 to the power 4?

Tanzania [10]

3^2/3^4

To find the answer, we can use this equation:

a^m / a^n = a^m - n

We can now just use 2 - 4, which equals -2.

Now we have 3^-2

3^-2 in decimal form is 0.11111, which equal to 1/9

5 0

3 years ago

Read 2 more answers