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3 years ago

A quadratic equation is shown below:

Mathematics

1 answer:

Mariulka [41]3 years ago

7 0

hello :

help :
the discriminat of each quadratic equation : ax²+bx+c=0 ....(a ≠ 0) is :
Δ = b² -4ac
1 ) Δ > 0 the equation has two reals solutions : x = (-b±√Δ)/2a
2 ) Δ = 0 : one solution : x = -b/2a
3 ) Δ < 0 : no reals solutions

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Which statements about the graph of the function f(x) = –x2 – 4x + 2 are true? Check all that apply.

Nitella [24]

Answer:

See attached picture

Step-by-step explanation:

The function $f(x) = -x^2-4x+2$ has the following characteristics:

• Not factorable

• Zeros/roots: $x= -2 +/- \sqrt {6}$

• Negative leading coefficient

• Has a vertex at (-2,6)

• Its graph is a parabola and upside down U shape.

• It has a maximum value of 6.

7 0

3 years ago

Find two numbers such that the sum of the first and three times the second is 5 and the sum of the second and two times the firs

Sav [38]

Answer:

first number= 19/5

second number= 2/5

Step-by-step explanation:

first number= a

second number= b

a+3b=5 equation 1

b+2a=8 equation 2

using equation 2 we have

b=8-2a

using equation 1 we have

a+3(8-2a)=5

a+24-6a=5

24-5=6a-a

19=5a

a=19/5 = first number

so using b=8-2a

we have

b=8-2(19/5)

b=8-(38/5)

b=2/5 = second number

4 0

3 years ago

I don’t get this lol...really need help with this!

Hunter-Best [27]

Look up the equation for it

4 0

3 years ago

The corr standard form for 100000+2000+500+150+17+0.08

kari74 [83]

100000 + 2000 + 500 + 150 + 17 +0.08

= 102000 + 500 + 150 + 17 + 0.08

= 102500 + 150 + 17 + 0.08

= 102650 + 17 + 0.08

= 102667 + 0.08

= 102667.08 <--

7 0

3 years ago

Read 2 more answers

What is statistical power and how would you calculate it?

Natasha_Volkova [10]

Answer:

The statistical power of a hypothesis test is the probability of detecting an effect, if there is a true effect present to detect. Power can be calculated and reported for a completed experiment to comment on the confidence one might have in the conclusions drawn from the results of the study.

I hope it's helpful!

3 0

3 years ago