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4 years ago

You have 10 m of ribbon. How much is left after 7.819 m is cut off?

Mathematics

1 answer:

gavmur [86]4 years ago

4 0

Answer:

2.181m of ribbon is left

Step-by-step explanation:

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WILL GIVE BRAINLIEST! Is the relationship between x and y as shown in this table a proportional relationship? Explain your answe

Mumz [18]

Answer:

No, a porportional relationship is not shown

Step-by-step explanation:

Up until 4(x) and 10(y), the relationship is porportional. Then, when x increases by 2, y also only increases by 2. Y would need to increase by 5.

4 0

3 years ago

The domain and range of 5x squared plus 10x what is the domain and range of f of x equals 5x squared plus 10x

liberstina [14]

Answer:

Domain: set of all real numbers

Range: $y \geq -5$

Step-by-step explanation:

We have to find the domain and range of the function:

$f(x) =5x^2+10x$

This is a quadratic function, shape of a "U", that's called a parabola.

The domain is the set of x values for which the function is defined.

The range is the set of y values for which the function is defined.

Normally, any parabola in the form $ax^2+bx+c$ has domain as "all real numbers". This is the case for this problem as well, thus,

Domain = set of all real numbers

Now, for the range, we have to look at the minimum value of the function. So, the range would be y values greater than or equal to the minimum number. Lets find the minimum value of this function.

We have to find the value of x for which the minimum occurs by using the formula:

$x=\frac{-b}{2a} =\frac{-10}{2(5)} =-1$

Note: value of a is "5" and b is "10"

Now, we plug this into the function to find the minimum value:

$f(x)=5x^2+10x\\f(-1)=5(-1)^2 +10(-1)\\f(-1)=-5$

So, the range is set of all real numbers greater than or equal to -5.

8 0

3 years ago

URGENT

Stolb23 [73]

Answer:

what's wrong with her??

Step-by-step explanation:

also okayy

3 0

3 years ago

Read 2 more answers

Write addition sentences (expression) where the sum is zero. can someone make a expression

12345 [234]

(-2)+2=0, (-0.5)+0.5=0, and (-5)+5=0

All those equations answers are 0, please mark me brainiest, and hope I helped!

4 0

3 years ago

Read 2 more answers

How can the equation of a parabola be derived when given the focus and the directrix?

pickupchik [31]

The distance between any point (x0,y0) on the parabola and the focus (m,n) is the same as the distance between (x0,y0) and the directrix line ax+by+c. The distance between (x0,y0) and focus (a,b) is \sqrt((x-m)^2+(y-n)^2). The distance between (x0,y0) and ax+by+c is |ax0+by0+c|/\sqrt(m^2+n^2). Equalize these two expressions.

4 0

3 years ago