What is the value of the underlined digit in 207 underlined digit 7

Mathematics

1 answer:

ladessa [460]3 years ago

3 0

Answer:

Its just 7

Step-by-step explanation:

Count the places. 200+7=207

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PLEASE HELP the answer is not 1/4^-2

hram777 [196]

Answer:

4^3÷4^5

4^(3-5)

4^-2

1/4^2

6 0

3 years ago

Read 2 more answers

Kiki recorded a video of her parakeet repeating phrases that she said. The video is 234 minutes long. Kiki watched the video 212

PilotLPTM [1.2K]

Answer:

826.8 hours

Step-by-step explanation:

Given data

Lenght of video= 234minutes

number of times watched= 212 times

Based on the information given, we can estimate the number of hours spent watching the video

=234*212

=49608 minutes

in hours

=49608/60

=826.8 hours

in days

=826.8/24

=34.45 days

8 0

3 years ago

What are the zeros of the quadratic function f(x) = 2x2 + 8x – 3?

jenyasd209 [6]

Answer:

$x=-2-\sqrt{\dfrac{11}{2}}\ \text{and}\ x=-2+\sqrt{\dfrac{11}{2}}$

Step-by-step explanation:

My favorite way to go at this is to look at a graph. It shows the vertex at (-2, -11). Since the leading coefficient is 2, this means the roots are ...

$-2\pm\sqrt{\dfrac{11}{2}}$

where the 2 in the denominator of the radical is the leading coefficient.

You can also use other clues:

the axis of symmetry is -b/(2a) = -8/(2(2)) = -2, so answer choices C and D don't work
the single change in sign in the coefficients (+ + -) tells you there is one positive real root, so answer choice B doesn't work.

The first answer choice is the only one with values symmetrical about -2 and one of them positive.

You may be expected to use the quadratic formula:

$x=\dfrac{-b\pm\sqrt{b^-4ac}}{2a}=\dfrac{-8\pm\sqrt{8^2-4(2)(-3)}}{2(2)}\\\\=\dfrac{-8}{4}\pm\dfrac{\sqrt{88}}{4}=-2\pm\sqrt{\dfrac{11}{2}}$