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
scZoUnD [109]
1 year ago
15

1-104. Solve each equation. Give solutions in both exact and approximate forms. HomeworkHelpa. X2+3x-3=0b. 3x2-7x=12

Mathematics
1 answer:
Alex_Xolod [135]1 year ago
8 0

According to the given question we have the following equations:

a. x2+3x-3=0

b. 3x2-7x=12

a. X2+3x-3=0

The first step to calculate this equation is:

Move the -3 to the other side:

So, the equation would be:

X2+3x=3

x2+3x=5x

Therefore:

5x=3

x=3/5

a. The value of x would be 3/5

b. 3x2-7x=12

First step:

Multyply 3x to 2, so:

3x*2=6x

Next we can proceed to calculate the value of x:

6x-7x=12

-x=12

x=-12

b. The value of x would be -12

1

You might be interested in
What would be the x and y coordinates of y = -3x + 1?
adoni [48]

Answer:

(-2,7)

(-1,4)

(0,1)

(1,-2)

(2,-5)

6 0
3 years ago
Read 2 more answers
Is this a right triangle?<br> 25 cm, 23 cm, and 14 cm.<br> O YES<br> O NO
madam [21]

Answer:

no

Step-by-step explanation:

6 0
2 years ago
If you divide the age of the first President Bush when he was inaugurated by 2 and add 14 years, you get the age of President Cl
konstantin123 [22]

Answer:

64

Step-by-step explanation:

32+14=46

8 0
2 years ago
A grower believes that one in five of his citrus trees are infected with the citrus red mite. How large a sample should be taken
mihalych1998 [28]

Answer:

n=6147

Step-by-step explanation:

1) Notation and definitions

X=1 number of citrus trees that are infected with the citrus red mite.

n=5 random sample taken

\hat p=\frac{1}{5}=0.2 estimated proportion of citrus trees that are infected with the citrus red mite.

p true population proportion of citrus trees that are infected with the citrus red mite.

Me=0.01 represent the margin of error desired

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})

In order to find the critical values we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical values would be given by:

t_{\alpha/2}=-1.96, t_{1-\alpha/2}=1.96

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.01 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.2(1-0.2)}{(\frac{0.01}{1.96})^2}=6146.56  

And rounded up we have that n=6147

5 0
3 years ago
Ten minutes into the hot dog eating contest, there are 450 hot dogs remaining. At 25 minutes, 375 hot dogs are left. Assuming th
8_murik_8 [283]
480-3t 
t is in minutes.
hope this helps some.
8 0
3 years ago
Other questions:
  • Match the pairs of equations that represent concentric circles. Tiles
    11·1 answer
  • The USDA reported that in 1990 each person in the United States consumed an average of 133 pounds of natural sweeteners. They al
    15·2 answers
  • How do you solve this system , y=1/2x-4 and y=-2x+1 by graphing
    13·1 answer
  • What expression is equivalent to the expression (4x+12) + 7x?
    12·2 answers
  • How do I figurevout <br> 2(x-y) and 2x-2y
    8·1 answer
  • Find the mean absolute deviation of 22,25,80,55,32,68,73,45​
    13·1 answer
  • In a survey of 1200 teenagers, 48% said they are involved in an extracurricular activity. What is the margin of error for the su
    8·1 answer
  • Simplify the expression.
    13·1 answer
  • What is the value of the expression when y = 2?
    12·1 answer
  • Ruby ate 1/5 of a pie . If there was 10 slices of pie , how many did she eat . <br> SHOW YOUR WORK
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!