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KatRina [158]
3 years ago
7

Haley is twice as old as Riley. The sum of their ages is 39. Write an equation that represents (x) , Riley's age.

Mathematics
2 answers:
kenny6666 [7]3 years ago
6 0

Answer:

X=39×2. Answer: 39×2= 78

RideAnS [48]3 years ago
4 0

Answer:

Equation: 2x+x=39

Hailey is 26 years old and Riley is 13 years old.

Step-by-step explanation:

Hailey- 2x

Riley- x

2x+x=39

3x=39

x=13

2x=26

Hailey is 26 years old and Riley is 13 years old.

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a line is perpendicular to y = 3/7x - 2 and intersects the point (3,3). What is the equation of this perpendicular line?
snow_lady [41]

Answer:

y = -7/3x + 10

Step-by-step explanation:

Step 1: Find the slope of the perpendicular line

Do this by taking the negative inverse of the first line

m = -7/3

Step 2: Find <em>b</em>

y = mx + b

y = -7/3x + b

3 = -7/3(3) + b

3 = -7 + b

b = 10

You should get y = -7/3x + 10 as your final answer.

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3 years ago
Which is the equivalent of 12.42 written in DMS form?
nika2105 [10]
12.42

12°+.42(60)

12°25.2'

12°25'+.2(60)

12°25'12"
3 0
3 years ago
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Okay here is another math problem I'll give a brainliest for the right answer!
Sliva [168]
To find the total area of this figure, you have to find the area of each of the separate figures and then add those 2 answers together. Your work should look like this:

2 x 2 = 4

8 x 8 = 64

64 + 4 = 68

Your answer should be 68 ft.^2
4 0
3 years ago
What is the solution to the inequality 16x - 70x &lt; 27?
vlada-n [284]

Answer:

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What is the y-intercept of the line passing through the point 5, -6 with a slope of -1 over 7
morpeh [17]

Answer:

  • The y-intercept is (0, -37/7).

Explanation:

When you have one point and the slope of a line you can find its equation by using the point-slope form of the linear function:

  • m = slope
  • point = (a, b)
  • point-slope equation: (y - b) = m (x - a).

Now substitute m = -1/7 and (a,b) = (5, - 6)

  • y - (-6) = -1/7 (x - 5)

Solve for y:

  • y + 6 = - 1/7 ( x - 5)
  • 7y + 7(6) = - (x - 5)
  • 7y + 42 = - x + 5
  • 7y = - x + 5 - 42
  • 7y = - x - 37
  • y = -(1/7)x - 37/7 ← this is the slope-intercept form of the equation.

The y-intercept is the point when x = 0. So, the corresponding y-coordinate is the constant term in the last equation:

  • y = 0 - 37/7 = - 37/7

And the y-intercept is the point (0, -37/7).

5 0
4 years ago
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