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3 years ago

(8+12)+10=8+(12+10) A.True B.False

Mathematics

2 answers:

vampirchik [111]3 years ago

7 0

The answer is a true

Ganezh [65]3 years ago

7 0

<span>(8+12)+10=8+(12+10) A.True B.False
</span>True

It's <span>associative property of addition. It's regrouped and sum remains the same.</span>

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olga nikolaevna [1]

Answer:

102

Step-by-step explanation:

it is an isosceles triangle as two sides are equal i.e 3.3 so angles opposite to equal sides are also equal so 39 plus 39 plus x = 180°

78 plus x =180

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3 years ago

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The height of a small rock falling from the top of a 124-ft-tall building with an initial downward velocity of –30 ft/sec is mod

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Answer:

Option 3.

Step-by-step explanation:

The given function is

$h(t)=-16t^2-30t+124$

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It is a downward parabola.

Equate the function equal to 0, to find the time at which the rock touch the ground.

$-16t^2-30t+124=0$

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$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

Using quadratic formula, we get

$t=\dfrac{-(-30)\pm \sqrt{(-30)^2-4(124)(-16)}}{2(-16)}$

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