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weeeeeb [17]
3 years ago
9

Math question (working too, if possible)

Mathematics
1 answer:
Alecsey [184]3 years ago
7 0
0.015 x 600 =9 so more than expected
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If a=-1,b=-6 and c=2 then what is the value of b2-4ac?​
grandymaker [24]

Answer:

-4

Step-by-step explanation:

(-6)(2)-4(-1)(2)

(-12)-(-8)

-12+8=-4

4 0
3 years ago
A researcher posts a newspaper advertisement offering 520 in exchange for participation in a short study. The researcher accepts
iVinArrow [24]

Answer:

It's a valid sample because the first five people were selected to participate.

Step-by-step explanation:

True because random people who saw the advertisement responded. By chance, not every person who saw the advertisement answered, therefore it was random, but it would be more random if he decided to reject the second, fourth, sixth, and eighth person, and only the first, third, fifth, seventh, and ninth were chosen.

5 0
3 years ago
What is the equation of the circle with the center (3,5) that passes though the point (-4,10)
choli [55]
(x-3)^2 + (y-5)^2 = 74
Radius is about 8.602
4 0
3 years ago
After proving two triangles are congruent, then one can prove parts of a triangle are congruent using the reasoning CPCTC.
KatRina [158]

Answer:

The answer is True because CPCTC stands for Corresponding Parts of Congruent Triangles are Congruent.

7 0
3 years ago
Brainliest <br> Please do one of the above<br> (I would appreciate if you did more then one)
Temka [501]

Answer:

a) 52.5 ft. b)40.1ft c)12.5ft d) 72.6

Step-by-step explanation:

a) The height of the lighthouse is 84ft, and the angle of elevation is 58 degrees.

tan58=84/x

find x by dividing 84 by tan58, and you get 52.5ft.

b) do the same thing, except 131 is in the base of the right triangle shape. That being said, do tan17=x/131.

multiply 131 by tan17, and you get x=40.1 feet.

c) This question wants you to find the length of the slide, (basically the hypotenuse).

given the angle to be 46, do sin46=9/x

since sin is opp/hyp

9/sin46= 12.5ft

d) Find the angle of elevation by using inverse tan given the base to be 5, and the height to be 16ft.

tan^-1=(16/5)=theta

x=72.6 hope this helps!

5 0
3 years ago
Read 2 more answers
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