What is this hurry please will give brainluest

Mathematics

1 answer:

aleksandr82 [10.1K]3 years ago

3 0

Answer:

450cm²

Step-by-step explanation:

The area of the kite is made up of two pairs of congruent triangles. Find the area of these and add to get the kite's area. (area of triangle = (1/2)(base)height))

2(0.5*15*20)+2(0.5*15*10)

300+150

450

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Can someone help me

ryzh [129]

Answer:

Answer a: mST=20

Answer b: mST=48

Step-by-step explanation:

Problem a:

3a-5=2a+50

a=55

2(55)+50=160

180-160=20

Problem b:

180=4c-12

192=4c

48=c

7 0

3 years ago

An object is launched from a platform.

tankabanditka [31]

Answer:

Step-by-step explanation:

Ground level is where h = 0, so solve the equation ...

h(x) = 0

-5(x -4)^2 +180 = 0 . . . . substitute for h(x)

(x -4)^2 = 36 . . . . . . . . . . divide by -5, add 36

x -4 = 6 . . . . . . . . . . . . . . positive square root*

x = 10 . . . . . . add 4

The object will hit the ground 10 seconds after launch.

_____

* The negative square root also gives an answer that satisfies the equation, but is not in the practical domain. That answer would be x = -2. The equation is only useful for time at and after the launch time: x ≥ 0.