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ivann1987 [24]
2 years ago
8

Did I do it right? Please help ASAP!

Mathematics
1 answer:
Naddik [55]2 years ago
4 0

Answer:yes

Step-by-step explanation:

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1 Stefanie is painting her bedroom. She can paint 123 square feet in 5 of an hour. How many square feet can she paint in one hou
gayaneshka [121]
Stefanie can paint 24.6 square feet in an hour. Sorry if this is incorrect, the way the question is formatted is kinda confusing.
4 0
3 years ago
1. Identify the y-intercept and the axis of symmetry for the graph of
melamori03 [73]

Answer:

The correct option is C). 42,x=(-2)

Point (0,42) is y-intercept of f(x)

x+2=0 is equation of axis of symmetry

Step-by-step explanation:

The given function is f(x)=10x^{2} +40x+42

To find y-intercept:

The y-intercept is point were x=0

y=f(x)=10x^{2} +40x+42

y=f(0)=10(0)^{2} +40(0)+42

y=42

Therefore,Point (0,42) is y-intercept of f(x)

To find axis of symmetry of f(x):

We know that f(x) is equation of parabola

Hence, the x -coordinate of the vertex of the parabola is the equation of the axis of symmetry.

if the equation of parabola is f(x)=ax^{2} +bx+c then, the axis of symmetry is given by x=-\frac{b}{2a}

Therefore, for f(x)=10x^{2} +40x+42

The axis of symmetry will be,

x=-\frac{b}{2a}

a=10 and b=40

x=-\frac{40}{2(10)}

x=-2

x+2=0 is equation of axis of symmetry

Thus,

The correct option is C). 42,x=(-2)

<em>Note: In figure, blue curve is f(x) and black line is axis of symmetry</em>

5 0
3 years ago
Another math problem
Schach [20]

Answer:

sorry no se la respuesta

8 0
3 years ago
If the midpoint of the line segment from (x,y) to (-4,11) is (0,-4), what are the values of x and y?
ch4aika [34]

Answer: the other midpoint is on (-19, 5)

Step-by-step explanation:

The slope of the line is -15, 4. And if the midpoint is (0,-4) then all you have to do is repeat the slope again and you’ll get the answer!

5 0
2 years ago
What are the domain and range of the step function below ?
erastova [34]

Answer:

B

Step-by-step explanation:

8 0
2 years ago
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