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2 years ago

13

True or False? A right triangle can have a leg measuring 10cm and a hypotenuse measuring 10cm

1 answer:

Citrus2011 [14]2 years ago

5 0

True, and it's called an isosceles right triangle :D

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Scott is going for a run. He runs for 12.5 miles at a speed of 5 miles per hour. For how many hours does he run?

JulsSmile [24]

Answer:

2.5 hrs

Step-by-step explanation:

first you have to divide the number 12.5 and 5 because it says at the speed of 5 miles per hour. So when you do 12.5 divided by 5 it equals 2.5.

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2 years ago

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One more: even more points xd

Reil [10]

I want points too hahah

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2 years ago

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Find the sum of a finite geometric sequence from n = 1 to n = 8, using the expression −2(3)^n − 1.

Kazeer [188]

The sum if the geometric sequence given by:
an=-2(3)^(n-1)
will be:
when:
n=1
an=-2
when n=2
a2=-6
when n=3
a3=-18

when n=4
a4=-54

when n=5
a5=-162

when n=6
a6=-486

when n=7
a7=-1458

when n=8
a8=-4374

thus the summation of the term will be:
Sn=(-4374+-1458+-486+-162+-54+-18+-6+-2)
Sn=-6560
the answer is -6560

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2 years ago

Find the function value. tan495°

inysia [295]

Answer: -1

Step-by-step explanation:

You want to find an angle that is coterminal to 495. So, subtract 360 degrees until youre in the range of 0-360. I got 495 - 360 = 135°

Tangent is equal to $\frac{sin(theta)}{cos(theta)}$ , we already solved theta which was 135°

This next part is hard to explain to someone who doesnt know their trig circle, idk if you do. The angle 135 is apart of the pi/4 gang. So we know this is going to be some variant of √2/2. Sine of quadrant 1 and 2 is gonna be positive:

$sin135=\frac{\sqrt{2} }{2}$

Now lets do cosine of 135°, which again is apart of the pi/4 gang because its divisible by 45°. Its in quadrant 2 so the cosine will be negative.

$cos135=-\frac{\sqrt{2} }{2}$

The final step is to divide them. They are both fractions so you should multiply by the reciprocal.

$\frac{\sqrt{2} }{2} *-\frac{2}{\sqrt{2} } =-\frac{2\sqrt{2} }{2\sqrt{2} } =-1$

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3 years ago

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IM IN DESPERATE NEEED!!!<br> What is the solution to this system of equations?

natta225 [31]

Answer:

$x + y - x = 6 - y - 4 \\ y = 2 - y \\ 2y = y \\ y = 1 \\ x + y = 6 \\ x + 1 = 6 \\ x = 5$

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2 years ago