Solve the equation. 11 = –d + 15 11 6 4

A grocery store buys items and then applies a markup of 70%. What is the retail price of item that originally costs $10?

Art [367]

The answer you are looking for would be 3 dollars

3 0

2 years ago

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If x+a is a factor of 2x²+2ax+5x+10,find a.

vazorg [7]

If $x+a$ is a factor of the polynomial, it means that $-a$ is a root of the polynomial.

In fact, if a polynomial $p(x)$ has a root $x_0$ (i.e. $p(x_0)=0$ ), then the polynomial is divisible by $(x-x_0)$

In your case, you know that the polynomial is divisible by $(x+a)=(x-(-a))$ , so $-a$ is a solution.

Let's evaluate $p(-a)$ and set it to zero:

$2(-a)^2+2a(-a)+5(-a)+10 = 0 \iff 2a^2-2a^2-5a+10=0 \iff -5a+10 = 0 \iff a = 2$

We can check the answer: if $a=2$ the polynomial becomes

$2x^2+2(2)x+5x+10 = 2x^2+9x+10$

And we're claiming that $-a=-2$ is a root of this polynomial:

$2(-2)^2+9(-2)+10 = 2\cdot 4 - 18 + 10 = 0$

5 0

3 years ago

Finding Account Balances In Exercise, complete the table to determine the balance A for P dollars Invested at rate for years com

Arlecino [84]

Answer:

i have no idea

Step-by-step explanation:

4 0

3 years ago

In your own words, describe the difference between correlation and causation. Give an example (not given in the content) of two

Semmy [17]

The difference between causation and correlation is that, Causation is characterized by cause-and-effect while correlation establishes a probable relationship.

<h3>What is the difference between Causation and correlation?</h3>

While Causation is characterized by a situation in which an action certainly causes an outcome and hence, is described as a cause-and-effect relationship, Correlation on the other hand only establishes a relationship between the two events and doesn't necessarily ascertain the occurrence of the other event .

An example of two variables which may be correlated is; the height and weight of an individual in which case it is generally perceived that taller people are heavier.

Read more on correlation and causation;

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4 0

1 year ago

What is 26% of 480? Please

erica [24]

Answer:

124.8 is 26% of 480.

Step-by-step explanation:

required percentage is :

26/100 × 480
13 / 50 × 480
13 / 5 × 48
124.8

i hope it helped...

3 0

3 years ago

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Solve the equation. 11 = –d + 15 11 6 4 –4