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2 years ago

Compute the value of the discriminant and give the number of real solutions of the quadratic equation. -4x^2+3x+1=0

1 answer:

5 0

-4x^2+3x+1=0
D = b² - 4ac = 3² - 4 * (-4) * 1 = 9 + 16 = 25
D>0 ⇒ this equation has two solutions.

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A construction crew must build 4 miles of road in one week. On Monday, they build 12 mile of road. On Tuesday, they build 13 mil

Julli [10]

$\frac{19}{6}$ many more miles of road are left to build .

Step-by-step explanation:

Here we have , A construction crew must build 4 miles of road in one week. On Monday, they build 1/2 mile of road. On Tuesday, they build 1/3 mile of road. We need to find that How many more miles of road are left to build . Let's find out:

On Monday, they build 1/2 mile of road.
On Tuesday, they build 1/3 mile of road.

Let Miles of road left to build is x So,

⇒ $\frac{1}{2} +\frac{1}{3} +x = 4$

⇒ $x = 4 - (\frac{1}{2} +\frac{1}{3})$

⇒ $x = 4 - (\frac{1(3)+1(2)}{6} )$

⇒ $x = 4 - (\frac{5}{6} )$

⇒ $x = (\frac{4(6)-5}{6} )$

⇒ $x = \frac{24-5}{6}$

⇒ $x = \frac{19}{6}$

Therefore, $\frac{19}{6}$ many more miles of road are left to build .

5 0

2 years ago

Read 2 more answers

Write in exponential form. 25

lukranit [14]

25 in exponential form: $25^{1}$

Factors to make 25 in exponential form: 5 * 5 = 5^2, 1 * 25 = 25^1

4 0

2 years ago

The district manager of four different restaurants wanted to investigate whether the four restaurants differed with respect to c

Alex_Xolod [135]

Answer:

Hello your question is incomplete attached below is the complete question

answer : There is not convincing statistical evidence to suggest that the proportion of customers who order dessert at each restaurant is not the same based on family classification. ( E )

Step-by-step explanation:

To arrive at this conclusion we will determine the Null and alternate hypothesis

H0 : Number that orders dessert is same based on family classification given

Ha : Number that orders dessert is not the same based on family classification given

from the question the p-value of Chi-square test is 0.092 > 0.05 hence we will fail to reject the null hypothesis. therefore we can conclude that

There is not convincing statistical evidence to suggest that the proportion of customers who order dessert at each restaurant is not the same based on family classification

5 0

2 years ago

The second angle in a triangle is one third as large as the first. The third angle is two thirds as large as the first. Find the

Zielflug [23.3K]

First angle 90 degrees

Second angle 30 degrees

Third angle 60 degrees

6 0

2 years ago

A mountain climber starts a climb at an elevation of 453 feet above sea level. At his first rest stop he has climbed 162 feet, a

Sedaia [141]

162
+207
= 369

Okay, so it says he descends 285 feet after he's climbed 369 feet. That means he needs to descend a bit more to reach 453 feet, which we'll just call 0 for now. First, we need to do some subtraction:

369
- 285
= 84

Okay, we know he needs to descend 84 feet to get to his starting point.
So your answer is C

8 0

2 years ago