The slope formula can be used to prove a triangle has
<span>a right angle
and slope formula also prove that lines are parallel
so i conclude option B is correct
hope it helps</span>
Answer:
Y=7+3x, x=-3, y=-2
Step-by-step explanation:
3x-5y=1. Equation 1
3x-y=-7. Equation 2
-y=-7-3x isolate for y in equation 2
y=7+3x multiplied by -1 to get positive y
3x-5(7+3x)=1 substitute y value of equation 2 (7+3x) into equation 1
3x-35-15x=1
-12x=36
x=-3
solve for y.
3x-5y=1
3(-3)-5y=1
-9-5y=1
-5y=10
y=-2
I've drawn a triangle to represent the journey (see attached.
The angle from Home to Victim to Hospital is:
a =
Using the cos rule, we can solve for the length x:
Using the cos rule, we can solve for angle b:
So the bearing the helicopter has to travel is:
270 - 76.1 =
<u>
193.9 degrees (1 dp)</u>
And the distance it travels is
<u>31.2 km (1 dp)</u>
The total number of adult tickets sold is 250.
<h3>What is the total number of adults tickets sold?
</h3>
- Let the initial number of adult's ticket sold be represented with x
- Let the initial number of children's ticket sold be represented with y
x / y = 2/5
Cross multiply :5x = 2y
y = 5/2
y = 2.5x
(x + 70) / (y + 300) = 1/3
Cross multiply :210 + 3x = 300 + y
Substitute for y
210 + 3x = 300 + 2.5x
300 - 210 = 3x - 2.5x
90 = 0.5x
x = 90 / 0.5
x = 180
Total tickets sold = 180 + 70 = 250
To learn more about ratios, please check: brainly.com/question/9194979
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Answer:
7x+14
Step-by-step explanation:
7 times x = 7x
7 times 2 = 14
put it together 7x+14
