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3 years ago

100-y+10=90 please help

Mathematics

2 answers:

Kitty [74]3 years ago

7 0

If your solving for for y, then simplify both sides of the equation, then isolating the variable.
y = 20

Marat540 [252]3 years ago

6 0

Y equals 20 because what is 100 - 20 is 80 so you have a year and then you at 10 on today and got 90 so y equals 20

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The coldest temperature ever recorded east of the Mississippi is fifty-four degrees below zero in Danbury, Wisconsin, on January

pav-90 [236]

Answer:

-54 degrees F

Step-by-step explanation:

The coldest temperature ever recorded east of the Mississippi is fifty-four degrees below zero in Danbury, Wisconsin, on January 24, 1922.

The temperature is below zero so it is negative,

-54 degrees F

3 0

3 years ago

I need help can you please explain where does the 8 come from

BaLLatris [955]

Since you want to cancel something out, the book makes the 24 3 times eight so that both of the threes can be canceled out

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3 years ago

The graph of the function showing the path of a soccer ball thrown by a goalie in a video game, f(x) = –0.05x2 + 2.5x + 5.2, is

Tju [1.3M]

Answer:

The correct option is 4.

Step-by-step explanation:

The given function is

$f(x)=-0.05x^2+2.5x+5.2$

Where f(x) is height of the ball and x is the distance.

It is a polynomial function with degree 2. All polynomial functions are defined for all real numbers, therefore the mathematical domain of the function is all real numbers.

$-\infty$

Factorize the given function.

$f(x)=-0.05(x^2-50x-104)$

$f(x)=-0.05(x^2-52x+2x-104)$

$f(x)=-0.05(x(x-52)+2(x-52))$

$f(x) = -0.05 (x - 52) (x + 2)$

Put f(x)=0 to find the x intercepts.

$0 = -0.05 (x - 52) (x + 2)$

Equate each factor equal to 0.

$x=52,-2$

Therefore at x=52 and -2, the graph of f(x) intersects x-axis. Before x=-2 and after x=52 the values of f(x) is negative. Height cannot be negative, therefore reasonable domain is lie between -2 to 52.

Distance cannot be negative, therefore the reasonable domain must be positive.

$0\leq x\leq 52$