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3 years ago

Find the discriminant and the number of real roots for this equation 2 + 2x+7= 0

Mathematics

1 answer:

miv72 [106K]3 years ago

4 0

Step-by-step explanation:

2+2x+7=0

collecting like terms

2x+9=0

2x=-9

divide both sides by 2

x=-4.5

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Solve the following equation for b.<br> 2 = Q + f/b

slega [8]

Answer:

b= $\frac{f}{2-Q}$

Step-by-step explanation:

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3 years ago

Three financial institutions, A,B,C, are offering different rates on a loan. Is a offer 3.15 % annual compounded monthly, B offe

coldgirl [10]

Answer:

Step-by-step explanation:

Given that interest rates are as follows:

Let P be 100 dollars for each.

A) 3.15% compounded monthly.

Hence amount = $100(1+\frac{3.15}{1200} )^{12}$

Final amount = 103.20 dollars

B) 2.25% compounded quarterly

Final amt. = $100(1+\frac{2.25}{400} )^4$

=102.27

C) 2.05% compounded daily

Amount = $100(1+\frac{2.05}{36500} )^{365}$

=102.07

Obviously A is the best deal.

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4 years ago

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Dmitry_Shevchenko [17]

For students who took the FSA Geometry EOC Assessment in the 2014–15 school year or in 2016 prior to the adoption of passing scores, the alternate passing score is 492, which corresponds to the passing score of 396 for the Next Generation Sunshine State Standards (NGSSS) Geometry EOC Assessment

5 Ways to prepare for the EOC Mathematics Exam

1. Review vocabulary.

2. Meta-cognitive exercise #1: Play to your strengths and be aware of your weaknesses.

3. Practice manipulating the calculator.

4. Familiarize yourself with the test's structure.

5. Last, but not least, meta-cognitive exercise #2: Practice problem-solving strategies.

6 0

3 years ago

Read 2 more answers

Can anyone help me solve a trigonomic identity problem and also help me how to do it step by step?

dusya [7]

$\bf cot(\theta)=\cfrac{cos(\theta)}{sin(\theta)}
\qquad csc(\theta)=\cfrac{1}{sin(\theta)}
\\\\\\
sin^2(\theta)+cos^2(\theta)=1\\\\
-------------------------------\\\\$

$\bf \cfrac{cos(\theta )cot(\theta )}{1-sin(\theta )}-1=csc(\theta )\\\\
-------------------------------\\\\
\cfrac{cos(\theta )\cdot \frac{cos(\theta )}{sin(\theta )}}{1-sin(\theta )}-1\implies \cfrac{\frac{cos^2(\theta )}{sin(\theta )}}{\frac{1-sin(\theta )}{1}}-1\implies 
\cfrac{cos^2(\theta )}{sin(\theta )}\cdot \cfrac{1}{1-sin(\theta )}-1
\\\\\\
\cfrac{cos^2(\theta )}{sin(\theta )[1-sin(\theta )]}-1\implies 
\cfrac{cos^2(\theta )-1[sin(\theta )[1-sin(\theta )]]}{sin(\theta )[1-sin(\theta )]}$

$\bf \cfrac{cos^2(\theta )-1[sin(\theta )-sin^2(\theta )]}{sin(\theta )[1-sin(\theta )]}\implies \cfrac{cos^2(\theta )-sin(\theta )+sin^2(\theta )}{sin(\theta )[1-sin(\theta )]}
\\\\\\
\cfrac{cos^2(\theta )+sin^2(\theta )-sin(\theta )}{sin(\theta )[1-sin(\theta )]}\implies \cfrac{\underline{1-sin(\theta )}}{sin(\theta )\underline{[1-sin(\theta )]}}
\\\\\\
\cfrac{1}{sin(\theta )}\implies csc(\theta )$

7 0

3 years ago

I need this done in 10mins

astra-53 [7]

Answer:

Socko gained 3/5 kg from month 1 to month 2.

Step-by-step explanation:

Socko mass was 3/10 kg in month 1 and 9/10 kg in month 2.

The amount of mass he gained is k.

3/10 + k = 9/10

Subtract 3/10 from both sides.

k = 6/10

Reduce the fraction.

k = 3/5

Answer: Socko gained 3/5 kg from month 1 to month 2.

3 0

3 years ago