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2 years ago

PLEASE HELP!

Mathematics

1 answer:

Fed [463]2 years ago

8 0

Not sure for (b)

Step-by-step explanation:

(a)55+80+x=180 (angles inside the triangle)

135+×=+180

x=180-135

x=45

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HELP WILL GIVE BRAINLIEST QUICK

valentina_108 [34]

20 miles an hour is a slope of 20 on the miles versus hours graph.

Graph equivalent ratios following a pattern of moving right 1 and up 2 from the original point.

There's no grid shown. Assuming the ticks are 1 each on x and y, right one up two gives a slope of 2, not 20; check that it doesn't say "up 20". If it does check it, as written don't.

Draw a line from the origin that connects all the points.

Is this one of the checkables? If so CHECK ME. The line will have a constant slope of 20 mph.

Every point on the line is an equivalent ratio.

CHECK ME. Is this different than the last one? Yes, each point on the line has a constant ratio, it's 20 miles per hour.

As the line goes up, the speed increases.

The speed is the slope of the line. As we go along a line with constant slope, the speed doesn't change. Don't check.

Alexander can pick any ratio of miles per hour on the line and he will be biking at 20 mph.

Any pair (h,m) on the line through (0,0) and (1,20) will always have m/h=20mph. He can't really pick any ratio; it's always equivalent to 20mph. But as long as he picks from this line he'll be biking at 20mph, so let's CHECK THIS.

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3 years ago

Simplify the expression cos^2(x/2-2)/ sqrt 1 - sin^2 (x)

Kaylis [27]

cos^2(x/2-2)/ sqrt 1 - sin^2 (x)

Answer : 
B) cos(x) tan(x)

8 0

3 years ago

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At a camp there is sufficient food for 100 scouts for 12 days if 50 more

Mariulka [41]

Answer:

9 days

Step-by-step explanation:

100 + 50= 150

100 scouts= 12 days

×2 ÷2

200 scouts= 6 days

Midpoint of 100 scouts and 200 scouts= 150

Midpoint of 12 days and 6 days= 9 days

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3 years ago

Triangle ABC has vertices A(-3,0) B(0,6) C(4,6). Find the equations of the three medians of triangle ABC

Mariana [72]

Answer:

1. $y=-6x+6, y=\frac{6}{5} x+\frac{18}{5}, y=\frac{6}{11} x+\frac{42}{11}$

2. $y=-\frac{1}{2} x+2\frac{1}{4} , x=2, y=-\frac{7}{6}x+\frac{43}{12}$

Step-by-step explanation:

A(−3, 0), B(0, 6), and C(4, 6)

using the midpoint formula: $(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2})$ we can find all of their midpoint which is necessary to complete question 1 and 2

Mid AB=(-1.5, 3), Mid BC=(2, 6), Mid AC=(0.5,3)

Next, we have to find the slope of from the vertex and the midpoint of each side. We use the slope formula: $\frac{y_2-y_1}{x_2-x_1}$ .

You would get -6, 6/5, and 6/11.

Next you substitute in the coordinates for the equation of each for example: y=-6x, you switch in the set of cords AB which is (-1.5, 3). 3=-6(-1.5)+z and find that z=6, so the equation is y=-6x+6. As for the rest, repeat the same process until you find all 3 cords. You should get an answer of $y=-6x+6, y=\frac{6}{5} x+\frac{18}{5}, y=\frac{6}{11} x+\frac{42}{11}$

For question 2,

The line has to be perpendicular bisector to the midpoint, signifying that it has to split 2 angles into congruent angles and a side into half. In order to do that we need to first find the opposite reciprocal of each side's slope. Which means we need to once again use the slope formula and get the opposite reciprocal by $-\frac{1}{slope}$ . For all the opposite reciprocal slopes you get will be incorporated into the final formulas. That gives us the slopes of -1/2, 0 and -7/6. Then do the same process of matching cords with these incomplete equations and you can find the final equations of $y=-\frac{1}{2} x+2\frac{1}{4} , x=2, y=-\frac{7}{6}x+\frac{43}{12}$

I hope that helped with your question!! :)

Also I'm an RSM student too and I didn't know how to do them before so I searched it up.

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3 years ago

Two Alloys of Iron have different percentages of Iron in them. The first of them weights 6 kg and the second one weights 12 kg.

qwelly [4]

I believe it is 6kg as the answer

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3 years ago

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