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3 years ago

Find the distance between the points (-5,7) and ( -5,-4)

Mathematics

1 answer:

Lubov Fominskaja [6]3 years ago

8 0

Answer:

Step-by-step explanation:

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Combine these radicals. 3/5 + 2/45

Jet001 [13]

Answer:

(3√3 + 3√10)/3√5

Step-by-step explanation:

Radical means square root.

√3/5 + √2/45 = (3√3 + 3√10)/3√5

Note : √45 = √9 × 5 = √ 9 × √ 5 = 3√5

5 0

3 years ago

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

Contact [7]

Answer:

Option 3.

Step-by-step explanation:

The given function is

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

where, h(t) is the height of a small rock falling from the top of a 124-ft-tall building and t is the time in seconds.

It is a downward parabola.

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

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

If $ax^2+bx+c=0$ , the according to the quadratic formula

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

Using quadratic formula, we get

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

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

$t=-3.875, 2$

Time cannot be negative. So, the rock remain in the air in the interval 0 < t < 2.

Therefore, the correct option is 3.

6 0

3 years ago

Twice a number, increased by 20, is 52

SVEN [57.7K]

Answer:

Step-by-step explanation:

16 + 16 =32. 32 + 20 = 52

5 0

3 years ago

Matt has $39.25 to spend on drum classes. Each

Fittoniya [83]

Answer:

The equation is, y = 9x + 3.25 and spending $39.25 will give him 4 classes.

6 0

3 years ago

4(r+3)-3r=19 help me plz

bulgar [2K]

Since ur using r as a variable the answer is r = 7.

6 0

3 years ago

Read 2 more answers