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VashaNatasha [74]
3 years ago
12

Andrea had 32 problems to do for mathematics homework over the weekend. She did 1/4 of the problems on Friday night, and on Satu

rday she did 1/4 of the problems that were left to do. What was the total number of problems that Andrea needed to do on Saturday in order to complete her mathematics homework?
Mathematics
1 answer:
igor_vitrenko [27]3 years ago
6 0

Answer:

24

Step-by-step explanation:

            Problems at start =                 32

   -Problems done Friday = ¼ × 32 =  <u>  8</u>

Problems still to be done =                 24

Andrea had to do 24 problems on Saturday to complete the homework.

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Solve. 489.209 + 43.9
lidiya [134]

Answer:

533.109

Step-by-step explanation:

Just add all the numbers

8 0
3 years ago
When the solutions are going to be complex, which methods can be used to solve quadratic equations?
yKpoI14uk [10]
You could complete the square to state the vertex. 
You could use the quadratic equation to find the roots (which are complex). 

Try an example that will require both.

y = x^2 + 2x + 5

Step One
Get the graph. That's included below.

Step Two
Provide the steps for completing the square.
Note: we should get (-1,4)

y= (x^2 +2x ) + 5
y = (x^2 +2x + 1) + 5 - 1
y = (x +1)^2 + 4

The vertex is at (-1,4)

Step Three
Find the roots. Use the quadratic equation. Note that the graph shows us that the equation never crosses or touches the x axis. The roots are complex.

\text{x = }\dfrac{ -b \pm \sqrt{b^{2} - 4ac } }{2a}

a = 1
b = 2
c = 5

\text{x = }\dfrac{ -2 \pm \sqrt{2^{2} - 4*1*5 } }{2}
\text{x = }\dfrac{ -2 \pm \sqrt{4 - 20 } }{2}
\text{x = }\dfrac{ -2 \pm \sqrt{-16 } }{2}
\text{x = }\dfrac{ -2 \pm 4i }{2}
x = -1 +/- 2i

x1 = -1 + 2i
x2 = -1 - 2i And we are done.


7 0
3 years ago
Please help and explain if possible
never [62]
Divide it by 25 witch is the height then find the square root
5625 \div 25  =  \sqrt{513?}
6 0
2 years ago
What is the domain and range of quadratic function with vertex.
Alexus [3.1K]

Answer:

As with any function, the domain of a quadratic function f(x) is the set of x -values for which the function is defined, and the range is the set of all the output values (values of f ). Quadratic functions generally have the whole real line as their domain: any x is a legitimate input. The vertex will be the minimum (lowest point) of the graph if and the maximum (highest point) of the graph if

4 0
2 years ago
Please help me I want a good grade!!
krok68 [10]

Answer:

a

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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