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vovangra [49]
3 years ago
12

Question 7 of 10

Mathematics
1 answer:
Mama L [17]3 years ago
8 0

Answer:

B

Step-by-step explanation:

Given a quadratic equation in standard form

ax² + bx + c = 0 ( a ≠ 0 )

Then the discriminant is

Δ = b² - 4ac

• If b² - 4ac > 0 then 2 real irrational roots

• If b² - 4ac > 0 and a perfect square then 2 real rational roots

• If b² - 4ac = 0 then 1 real double root

• If b² - 4ac < 0 then 2 complex roots

Given

x² + 3x - 7 = 0 ← in standard form

with a = 1, b = 3, c = - 7 , then

b² - 4ac

= 3² - (4 × 1 × - 7) = 9 + 28 = 37

Since b² - 4ac > 0 then 2 real irrational roots

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5(x-7) = 6(x+2)<br>please help ... I got 11x = -23??​
eimsori [14]

Answer:

x = -47

Step-by-step explanation:

1. Use the distributive property

5 ( x - 7 ) = 6 ( x + 2 ) → 5x - 35 = 6x + 12

2. Subtract 5x from both sides of the equation

5x - 5x -35 = 6x - 5x + 12 → -35 = x + 12

3. Subtract 12 from both sides

-35 - 12 = x + 12 - 12 → -47 = x

4. So, the answer is

x = -47

4 0
3 years ago
A class contributed $8.40 in dimes and quarters to the red cross. in all, there was 45 coins. how many coins of each kind were t
rewona [7]
A dime is a ten cent coin while a quarter is a 25 cent coin. The total of the money should be $8.40. Let x be the number of dime and y be the number of quarter. The equation that would best represent the given problem is,
                                  0.1x + 0.25y = 8.40
                                      x + y = 45
The values of x and y are 19 and 26, respectively. Thus, there are 19 dimes and 26 quarters. 
5 0
3 years ago
Quick algebra 1 question for 50 points!
andrew-mc [135]

The predicted value of y when x =7 is -8.5

<h3>How to predict the y value?</h3>

Start by drawing the line of best fit through the points

See attachment for the graph.

From the attached graph, we have the following value

y = -8.5 when x = 7

Hence, the predicted value of y when x =7 is -8.5

Read more about scatter plots at:

brainly.com/question/2749543

#SPJ1

4 0
1 year ago
Which answer describes the function f(x)=x^5+2x ?<br><br><br> odd<br><br> even<br><br> neither
alekssr [168]

Answer:

Odd function

Step-by-step explanation:

The given function is f(x)=x^5+2x

We know that:

  • The function is even if f(-x) = f(x)
  • The function is odd if f(-x)=-f(x)
  • If the function doesn't satisfy these two properties then it is neither odd nor even.

Hence, we substitute x = -x to find f(-x)

f(-x)=(-x)^5+2(-x)\\=-x^5-2x\\=-(x^5+2x)\\=-f(-x)

Since, f(-x)=-f(x). Hence, the function is odd.

3 0
3 years ago
Read 2 more answers
This liberal arts college has/A decided requiring/B all students to study/C at least one/D non-Europeanlanguage. No error/E
zhuklara [117]

<u>This</u><u> liberal arts college</u><u> has </u><u>all students</u><u> to study.</u>

<u />

The correct option is B.

What Is a Liberal Arts College?

  • While many colleges and universities grant liberal arts degrees, a liberal arts college offers a focused liberal arts education.
  • These colleges generally emphasize small class sizes and a curriculum centered on the humanities, arts, social sciences, and natural sciences.

What's the difference between a liberal arts college and a regular college?

  • Most liberal arts colleges do not offer graduate school programs, unlike other universities.
  • They also tend to have small campuses and class sizes; in fact, many classes have fewer than 20 students.
  • Evans says some students find comfort in the sense of community that these more intimate settings can create.

Learn more about Liberal Arts College

brainly.com/question/17546886

#SPJ4

7 0
1 year ago
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