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3 years ago

Kahn academy question:

Mathematics

1 answer:

Rufina [12.5K]3 years ago

8 0

Answer:

2.97×10³

Step-by-step explanation:

3600 - 6.3×10² = 3600 -6.3×100 = 3600 -630 = 2970

= 2.97×1000

= 2.97×10³

_____

Your calculator can accept and display numbers in scientific notation.

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What is the answer to C

Ira Lisetskai [31]

Answer:

C = 15

Step-by-step explanation:

Both (7c-7)° & (6c-8)° if get combined will form a straight angle i.e. 180° because both the angles lie on the same line. So,

$7c - 7 + 6c - 8 = 180°$

$= > 13c - 15 = 180°$

$= > 13c = 180 + 15 = 195$

$= > c = \frac{195}{13} = 15$

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3 years ago

There are 48 colas and 24 lemon-lime sodas in the cooler. What is the ratio of colas to lemon- lime sodas?

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48:24 is the ration

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3 years ago

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In one U.S. city, the quadratic function f (x )equals 0.0039 x squared minus 0.42 x plus 36.79 models the median, or average,

Leviafan [203]

Answer:

The average age was minimum at 1954 and the average age is 25.5.

Step-by-step explanation:

The given quadratic function is

$f(x)=0.0039x^2-0.42x+36.79$

It models the median, or average, age, y, at which men were first married x years after 1900.

In the above equation leading coefficient is positive, so it is an upward parabola and vertex of an upward parabola, is point of minima.

We need to find the year in which the average age was at a minimum.

If a quadratic polynomial is $f(x)=ax^2+bx+c$ , then vertex is

$Vertex=(-\dfrac{b}{2a},f(-\dfrac{b}{2a}))$

$-\dfrac{b}{2a}=-\dfrac{(-0.42)}{2(0.0039)}=53.846153\approx 54$

54 years after 1900 is

$1900+54=1954$

Substitute x=54 in the given function.

$f(54)=0.0039(54)^2-0.42(54)+36.79=25.4824\approx 25.5$

Therefore, the average age was minimum at 1954 and the average age is 25.5.

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3 years ago

Show an example of commutative property of addition

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For example, if we use 5+3=8.
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3 years ago

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Not sure how to solve

LekaFEV [45]

Answer:

The Y intercept doesn't exist, and the slope is undefined

Step-by-step explanation:

The graph provided for us is a vertical line. x= 7

this means the line will go up and down forever without a slant because x will always equal 7.

Ex:

X | Y

7 | -3

7 | -2

7 | -1

7 | 0

7 | 1

7 | 2

7 | 3

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3 years ago