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sp2606 [1]
3 years ago
11

Kevin has a ratio of 2 wrong answers to 7 correct answers on his math test. If he got 6 questions wrong, then how many did he an

swer correctly
Mathematics
1 answer:
OlgaM077 [116]3 years ago
7 0

Answer:

21

Step-by-step explanation:

2:7 Ratio

Since he got 6 wrong it 6:?

6/2 = 3

3*7=21

6:21

He got 21 right

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What is the equation of a line that passes through the point?
Artist 52 [7]
<h3>Answer: 3x-2y = 5 (choice A)</h3>

=====================================================

Explanation:

The given graph passes through (0,2) and (2,5)

The slope of this line is

m = (y2 - y1)/(x2 - x1)

m = (5-2)/(2-0)

m = 3/2

Since the y intercept is b = 2, we go from y = mx+b to y = (3/2)x+2, which is the equation of the graphed line shown.

Any parallel line will have the same slope, but a different y intercept.

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

The parallel line must pass through (x,y) = (3,2). We'll use these coordinates along with m = 3/2 to find the y intercept b

y = mx+b

2 = (3/2)(3)+b

2 = 9/2+b

2-9/2 = b

4/2 - 9/2 = b

-5/2 = b

b = -5/2 ... is the new y intercept

The equation of the parallel line is y = (3/2)x-5/2, which is in slope intercept form

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

Let's convert to standard form

y = (3/2)x-5/2

2y = 3x-5 .... multiply everything by the LCD 2 to clear out fractions

2y+5 = 3x

3x = 2y+5

3x-2y = 5 ... is the equation in standard form of the parallel line

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

As a check, we can plug (x,y) = (3,2) into that last equation above to get

3x-2y = 5

3*3-2*2 = 5 ... replace x with 3, replace y with 2

9-4 = 5

5 = 5

Confirming that (x,y) = (3,2) is on the line.

3 0
3 years ago
Find the discount rate
kifflom [539]

we'd do the same as before on this one as well.

if we take 27.99 to be the 100%, what is 12 off of it in percentage?

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4 0
3 years ago
What is the sum of 1/2 + 1/4?<br><br> A. 2/8<br> B. 2/6<br> C. 4/8<br> D. 6/8
Pie

<em>3/4 is the total.</em>

<em></em>

<em></em>

<em>See attached image for explanation.</em>

<em></em>

<em>Please consider marking "Brainliest". </em>

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<em>Thanks <3</em>

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6 0
3 years ago
The following information is obtained from two independent samples selected from two normally distributed populations.
AysviL [449]

A. The point estimate of μ1 − μ2 is calculated using the value of x1 - x2, therefore:

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and σ is calculated using the formula:

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σ = 0.988297

 

Going back to the confidence interval:

Confidence interval = 1.83 ± (2.58) (0.988297)

Confidence interval = 1.83 ± 2.55

Confidence interval = -0.72, 4.38

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What is the approximate area of the pizza
Dovator [93]
If you have several different sized pizzas, you can compare their areas. So the area of a pizza is the length of the crust (circumference) divided by two times the distance from the edge to the middle (radius). Mathematicians use a special number called pi to calculate the circumference of a circle.
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4 years ago
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