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Lady bird [3.3K]
3 years ago
7

Solve each of the following equations. Be make sure to check your solutions. Solve for part b only.

Mathematics
1 answer:
Alona [7]3 years ago
3 0

Answer:

or, 3x-5=2.5x+3-x+4

or, 3x-1.5x=7+5

or, 2.5x=12

or, x=4.8 solved.

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How can 3.7 = x + (negative 5) be solved for x in one step?
Nesterboy [21]

Answer:

add five to 3.7

Step-by-step explanation:

aka 3.7+5=x

8.7=x  

i think

3 0
2 years ago
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Use the coordinates of the labeled point to find the point-slope equation of the line.
LenKa [72]

For this case we have that by definition, the equation of a line of the point-slope form is given by:

y-y_ {0} = m (x-x_ {0})

Where:

m: It's the slope

(x_ {0}, y_ {0}): It is a point through which the line passes

To find the slope, we need two points through which the line passes, observing the image we have:

(x_ {1}, y_ {1}): (3, -5)\\(x_ {2}, y_ {2}): (0,4)\\m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}} = \frac {4 - (- 5)} {0-3} = \frac {4 + 5} {-3} = \frac {9} {- 3} = - 3

Thus, the equation is of the form:

y-y_ {0} = - 3 (x-x_ {0})

We choose a point:

(x_{0}, y_ {0}) :( 3, -5)

Finally, the equation is:

y - (- 5) = - 3 (x-3)\\y + 5 = -3 (x-3)

Answer:

y + 5 = -3 (x-3)

Option D

6 0
3 years ago
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Rationalise the denominator of: -7/(√11 - √5)​
tatuchka [14]
-7(sqrt(11)+sqrt(5))/6


Mark brainliest please



Hope this helps
3 0
2 years ago
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The ground temperature at sea level is 60 degrees F. For every 100-foot increase in elevation, the temperature rises 1/10 of one
N76 [4]
<h3>Answer: B. 62 degrees fahrenheit</h3>

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

Explanation:

x = elevation in feet

y = temperature in fahrenheit

The temperature goes up 1/10 = 0.1 degrees for every 100-foot increase of elevation. So the slope is 0.1/100 = 0.001, which tells us how fast the temperature is increasing. In other words, the temperature goes up 0.001 degrees each time the elevation goes up by 1 foot.

The ground temperature is 60 degrees, which is our starting temperature. It's the value of y when x = 0. Therefore, 60 is the y intercept.

We have a slope of m = 0.001 and a y intercept of b = 60. The equation y = mx+b becomes y = 0.1x+60

Now plug in x = 2000 to find the temperature at this elevation

y = 0.001x+60

y = 0.001*2000+60

y = 2+60

y = 62

7 0
3 years ago
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What is 8/9 - 15/45
vagabundo [1.1K]
5/9 or 0.5 recurring
hope this helps :)
4 0
3 years ago
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