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BigorU [14]
3 years ago
9

he first three steps in determining the solution set of the system of equations, y = –x2 – 2x + 8 and y = 2x + 11, algebraically

are shown in the table. Which represents the solution(s) of this system of equations?
Mathematics
2 answers:
frutty [35]3 years ago
8 0

Question:

Which represents the solution(s) of this system of equations?

Answer:

(-3,-1)

ivann1987 [24]3 years ago
5 0

Answer:

The solutions are -3 and -1

Step-by-step explanation:

∵ y = -x² - 2x + 8

∵ y = 2x + 11

∴ -x² - 2x + 8 = 2x + 11

∴ -x² - 2x - 2x + 8 - 11 = 0

∴ -x² - 4x - 3 = 0 ⇒ divide both sides by -1

∴ x² + 4x + 3 = 0

∴ (x + 3)(x + 1) = 0

∴ x + 3 = 0 ⇒ x = -3

∴ x + 1 = 0 ⇒ x = -1

∴ The solutions are -3 and -1

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copy dot flip

35 * 2/5

70/5

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4 0
3 years ago
Brainlest!! which of the following graphs represents a function HURRY. ​
ahrayia [7]

Answer:

Graph A and C

Step-by-step explanation:

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5 0
3 years ago
Graph the line whose y-intercept is -7 and whose x-intercept is 1
vesna_86 [32]

Answer:

y=7x -7

Step-by-step explanation:

We are given two points, the y - intercept and the x - intercept.

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The equation of a line in slope - intercept form is:

y = mx + b, where m is the slope and b is the y - intercept.

We already have the y - intercept. So far we have:

y = mx - 7

What we're missing is the slope.

To find the slope, we can use this formula:

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m=\frac{0-(-7)}{1-0} \\\\m=\frac{7}{1}\\m=7

We now have the missing piece, the slope, so the equation now is:

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3 0
3 years ago
Objective 4.3Perform basic mathematical tasks in a spreadsheet.34.Alexander lends some money to Niraj. Alexander maintains a wor
murzikaleks [220]

Answer:

A. Auto Sum

Step-by-step explanation:

In a spread sheet, if there are so many entries in form of numbers, whether in form of row or a column, it might be a pain staking job to sum all them individually. In spread sheet, the best option is to perform auto sum option, which as shown by its name, will add up all the entries given and produce the answer.

Now in given options of the question, auto correct, auto summarize and auto format are not usable because all of these options will either summarize or provide average or perform formatting, as they are not mathematical functions since, Alexander wants to add up all the amount he lent to Niraj, which means a mathematical task, so auto sum, as a mathematical command is best option.  

8 0
3 years ago
Use and method to find the total number of outcomes in each situation.
Maksim231197 [3]
<h3>Answer:  6</h3>

===========================================================

Explanation:

Think of a table that has 2 rows and 3 columns.

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In short, all we have to do is multiply the number of classes for each subject.

5 0
3 years ago
Read 2 more answers
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