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ohaa [14]
3 years ago
15

Can i get some help with these LCD equations please.

Mathematics
1 answer:
Andre45 [30]3 years ago
3 0

Answer:

  y = -1/4

Step-by-step explanation:

  y/5 +3/10 = (y+2)/7

The LCD is 10·7 = 70. Multiplying the equation by 70 gives ...

  14y +21 = 10(y +2)

  14y +21 = 10y +20 . . . . eliminate parentheses

  4y + 21 = 20 . . . . subtract 10y

  4y = -1 . . . . . . . . . subtract 21

  y = -1/4 . . . . . . . . .divide by 4

_____

<em>Check</em>

  (-1/4)/5 +3/10 = (-1/4 +2)/7 . . . . . substitute for y

  -1/20 +6/20 = (7/4)/7 . . . simplify a bit, rewrite 3/10

  5/20 = 1/4 . . . . . . . . . . true

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A mouse can travel 1.5 miles a day. write an equation showing how far it travles
Vika [28.1K]
Let t = the number of days the mouse travels
Let D = the distance that the mouse traveled
The mouse travels at a rate of 1.5 miles per day, so R = 1.5 mi/day

The equation is:
Distance (D) = Rate (R) x Time (t)

SO:
Distance (D) = 1.5 mi./day X Time (t)
4 0
3 years ago
What is the slope of a trend line that passes through the points (5, 80) and (7, 65)?
Sedaia [141]

The slope of a trend line that passes through the points (5, 80) and (7, 65) is -7.5.

Step-by-step explanation:

If the line is passing through two points (x1, y1) and (X2, y2). The slope (m) can be calculated using following formula.

m = \frac{y2-y1}{x2-x1}

In this case,

x1  = 5

x2 = 7

y1  = 80

y2 =  65

By putting the values in formula, we get

m = \frac{(65-80)}{7-5}

m = \frac{(-15)}{2}

or

m = -7.5

Therefore, the slope of a trend line that passes through the points (5, 80) and (7, 65) is -7.5.

Learn more:

The following links have more information about slope

brainly.com/question/2586096

brainly.com/question/1978312

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3 0
3 years ago
Read 2 more answers
Answer!!!!!Please!!!!Will do anything!!!
Marizza181 [45]
I think it is the first one

hope this helps
3 0
2 years ago
Read 2 more answers
an object accelerates from rest to a velocity of 4.om / s over a distance of 20m . what was it's acceleration
AfilCa [17]
Acceleration is the change in velocity over time. There's are formula's for such problems which are called kinematics equations. Look em up. One of them doesn't have t (time) in them you would normally use that one to solve this problem. 16/2/20=a=0.4m/s^2

I did it for you but please look it up, understand and memorize it ;) 
7 0
3 years ago
NEED HELP QUICK!!
mrs_skeptik [129]

Answer:

(x - 2)² + (y - 6)² = 49

Step-by-step explanation:

Equation of a circle formula:  (x - a)² + (y - b)² = r²

where (a, b) is the center of the circle and r is the radius

Given, center = (2, 6) and radius = 7

Substitute this information in the equation of a circle formula.

⇒ Equation of the circle:  (x - 2)² + (y - 6)² = 49

3 0
2 years ago
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