1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
IgorLugansk [536]
3 years ago
5

Which equation shows the quadratic formula used correctly to solve 5x^2+3-4=0 for x

Mathematics
1 answer:
Neko [114]3 years ago
3 0

Answer:

the first one is correct

Step-by-step explanation:

You might be interested in
At a Psychology final exam, the scores are normally distributed with a mean 73 points and a standard deviation of 10.6 points. T
USPshnik [31]

Answer:

The score that separates the lower 5% of the class from the rest of the class is 55.6.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

\mu = 73, \sigma = 10.6

Find the score that separates the lower 5% of the class from the rest of the class.

This score is the 5th percentile, which is X when Z has a pvalue of 0.05. So it is X when Z = -1.645.

Z = \frac{X - \mu}{\sigma}

-1.645 = \frac{X - 73}{10.6}

X - 73 = -1.645*10.6

X = 55.6

The score that separates the lower 5% of the class from the rest of the class is 55.6.

3 0
3 years ago
Q5 Q9.) Let theta be an angle in standard position. Name the quadrant in which theta lies
Juliette [100K]
Sine is positive while cotangent is negative. So this must mean cosine is negative since cos/sin = cot. In other words, cotangent is the ratio of cosine over sine.

Because cosine is negative and sine is positive, this places theta in quadrant 2
This is where x < 0 and y > 0. Recall that on the unit circle, x = cos(theta) and y = sin(theta).

The answer is choice B) quadrant II
7 0
3 years ago
Read 2 more answers
Suppose y varies directly as x, and Y=80 when x=16 . Which of the following statements is true?
liubo4ka [24]
The following answer is B because it shows that it has to multiply the x - axis by the slope (5) to make sure that it can be equat to the y - axis.

y = 5x
y =5(16)
y = 80

(x, y) = (16, 80)
5 0
3 years ago
A certain aircraft can carry a maximum cargo weight of 1300 pounds. If the baggage weighs no more than 210 pounds, what is the l
VMariaS [17]
The answer is 1090 pounds because 1300, the max weight, minus 210, the baggage, is 1090. Hope this helps!
3 0
3 years ago
Choose the graph of the inequality X&lt; 7<br>choose one:​
Dafna11 [192]

3rd one. The circle is on 7 and is going to the left.

7 0
3 years ago
Other questions:
  • One half of the sum of a number and 10
    11·1 answer
  • 9 x 200 in expanded form
    6·2 answers
  • HELP HELP PLEASSEEE I HAV 2 MINUTES LEF
    11·2 answers
  • What is -1/6 multiplied by 6
    10·1 answer
  • Tina sends 12 text messages each day in June. A mobile phone company offers two packages. Package A: The first 100 texts each mo
    7·1 answer
  • I dont understand this​
    12·1 answer
  • Please help!!!!!!!!!!!!!!!!!!!
    7·1 answer
  • Simplify the expression using the distributive property.
    11·2 answers
  • 10) An object is moving at a speed of 8 miles
    9·2 answers
  • Solve for x.<br><br> 2 + 6x = 20<br> x = [?]
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!