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2 years ago

Which equation yields the solutions x=−3 and x=−4?

Mathematics

1 answer:

Elza [17]2 years ago

5 0

Answer:

a) 2x² + 14x + 24 = 0

Step-by-step explanation:

2x² + 14x + 24 = 0

2(x + 4) (x + 3) = 0

x = -4 or x = -3

x² - 6x + 5 = 0

(x - 1)(x - 5) = 0

x = 1 or x = 5

3x² + 30x + 48 = 0

3 (x + 8) (x + 2) = 0

x = -8 or x = -2

-3x² - 12x + 15 = 0

-3 (x + 5) (x - 1) = 0

x = -5 or x = 1

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PLEASE HELP!!!!

Allushta [10]

Intersection (repeated element in the set)

A={-9,0,5}
B={0,2,5,8}
C={-9,2,5}

Ans: C, {5}

*In set B and C, element 2 was repeated but not for set A.

6 0

3 years ago

Read 2 more answers

A food company sells salmon to various customers. The mean weight of the salmon is 37 lb with a standard deviation of 2 lbs. The

brilliants [131]

Answer:

The standard deviation for the mean weigth of Salmon is 2/3 lbs for restaurants, 2/7 lbs for grocery stores and 1/4 lbs for discount order stores.

Step-by-step explanation:

The mean sample of the sum of n random variables is

$\overline{X} = \frac{X_1+X_2+...+X_n}{n}$

If $X_1, ..., X_n$ are indentically distributed and independent, like in the situation of the problem, then the variance of $X_1 + .... + X_n$ will be the sum of the variances, in other words, it will be n times the variance of $X_1$ .

However if we multiply this mean by 1/n (in other words, divide by n), then we have to divide the variance by 1/n², thus $\overkine{X} = \frac{V(X_1)}{n}$ and as a result, the standard deviation of $\overline{X}$ is the standard deviation of $X_1$ divided by $\sqrt{n}$ .

Since the standard deviation of the weigth of a Salmon is 2 lbs, then the standard deviations for the mean weigth will be:

Restaurants: We have boxes with 9 salmon each, so it will be $\frac{2}{\sqrt{9}} = \frac{2}{3}$
Grocery stores: Each carton has 49 salmon, thus the standard deviation is $\frac{2}{\sqrt{49}} = \frac{2}{7}$
Discount outlet stores: Each pallet has 64 salmon, as a result, the standard deviation is $\frac{2}{\sqrt{64}} = \frac{1}{4}$

We conclude that de standard deivation of the mean weigth of salmon of the types of shipment given is: 2/3 lbs for restaurants, 2/7 lbs for grocery stores and 1/4 lbs for discount outlet stores.

7 0

2 years ago

Please help

Varvara68 [4.7K]

Answer:

$6 = cost of small box

$8 = cost of large box

Step-by-step explanation:

Let s = cost of small box

l = cost of large box

(1) 12s + 3l = 96 (2) 6s + 6l = 84

Multiply by -2 -24s - 6l = -192

-18s = - 108

s = $6 = cost of small box

12(6) + 3l = 96

72 + 3l = 96

3l = 24

l = $8 = cost of large box

7 0

2 years ago

When performing a horizontal analysis on an income statement, the percentage change in any individual item is calculated by div

oksian1 [2.3K]

Answer: C. the base period amount.

Explanation: While implementing a horizontal analysis on a given income statement, we compute a percentage change in any individual item by dividing the dollar amount of change from base to current time period with the base period amount.

i.e. % Change in Individual item = $\frac{Current\ Dollar\ - Base\ Dollar }{Base \ period \ amount}$

Therefore, the correct option in this case is (c)

4 0

2 years ago

What is the value of 7P3 ? A. 21 B. 35 C. 210 D. 840 i think a but idk

Aleksandr [31]

The answer is C.
Here's why, nPr = n!/(n-r)!. Plug in 7 for n and 3 for r. And you get 7!/(7-3)!.
Thus, 7!/4! = (7*6*5*4*3*2*1)/(4*3*2*1), which simplifies to 7*6*5 = 210

6 0

3 years ago

Read 2 more answers