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Allushta [10]
3 years ago
13

The product of the roots of 5 - 2m - 3m^2 = 0 is: A. -5/3 B. -3/5 C. 5/3

Mathematics
2 answers:
dimaraw [331]3 years ago
7 0
<span>m= <span><span><span><span>−5/</span>3 </span></span></span></span><span>   ,swnkadkjkkjmd,m,mdas</span>
svlad2 [7]3 years ago
4 0

Answer:

The correct option is A.

Step-by-step explanation:

The given equation is

5-2m-3m^2=0         ..... (1)

If a quadratic equation is defined as

ax^2+bx+c=0         ...... (2)

then product of roots is c/a.

From (1) and (2), we get

a=-3,b=-2,c=5

So, the product of the roots of given equation is

\text{Product of roots}=\frac{c}{a}

\text{Product of roots}=\frac{5}{-3}

\text{Product of roots}=-\frac{5}{3}

Therefore the correct option is A.

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How many are there then the total amount
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After a 16% increase the price of a pair of running shoes was $40.60. What was the old price of the shoes
Delvig [45]

Answer:

34.10

Step-by-step explanation:

Note:

16% = .16

Important:

What was the <u>old price</u> of the shoes

Solution:

40.60 x .16 = 6.946 [Round:6.50]

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5 0
2 years ago
A discount voucher offering 15% off is used to pay a bill. After using the voucher, the bill is reduced to £36.72.
Elena-2011 [213]

We can use the is/of=p/100 method for this problem. Since it's 15% off, this would mean that the bill is 85% of what it was initially. Plug the values into the is/of=p/100 formula.

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Solve  for x.

x=36.72/0.85

x=43.2

So, the bill was $43.20 before applying the voucher discount of 15% off.

3 0
3 years ago
Read 2 more answers
The scores on a test for a sample of 42 statistics students are summarized in the following table. 9, 90, 18, 80, 15, 70. Find t
igomit [66]
<h3>Answer:   78.6</h3>

Work Shown:

\begin{array}{|c|c|} \cline{1-2}\text{Number of People} & \text{Score}\\\cline{1-2}9 & 90\\\cline{1-2}18 & 80\\\cline{1-2}15 & 70\\\cline{1-2}\end{array}

Multiply across the rows to form a third column. Example: 9*90 = 810 in the first row.

\begin{array}{|c|c|c|} \cline{1-3}\text{Number of People} & \text{Score} & \text{Number*Score}\\\cline{1-3}9 & 90 & 810\\\cline{1-3}18 & 80 & 1440\\\cline{1-3}15 & 70 & 1050\\\cline{1-3}\end{array}

The values in the third column add to 810+1440+1050 = 3300

Divide this over the total number of people which is 9+18+15 = 42

The mean is 3300/42 =78.571 approximately which rounds to 78.6

5 0
2 years ago
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