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
Tomtit [17]
3 years ago
6

Jeff finds some bugs. he finds 10 fewer grasshopper than ladybugs. if jeff finds 5 grasshoppers how many lady bugs does jeff fin

d? how many crickets does he find? write two equations to solve the problem.
Mathematics
1 answer:
NemiM [27]3 years ago
8 0
There's not enough information to figure out the grasshoppers, but there should be 15 lady bugs, because 5+10=15
You might be interested in
6i-5=-17 what does i equal
vagabundo [1.1K]

Answer:

-2

Step-by-step explanation:

6i-5=-17

6i=-17+5

6i=-12

i=-12/6

i=-2

7 0
3 years ago
Read 2 more answers
A random sample of 20 students yielded a mean of ¯x = 72 and a variance of s2 = 16 for scores on a college placement test in mat
Helen [10]

Answer:

The 98% confidence interval for the variance in the pounds of impurities would be 8.400 \leq \sigma^2 \leq 39.827.

Step-by-step explanation:

1) Data given and notation

s^2 =16 represent the sample variance

s=4 represent the sample standard deviation

\bar x represent the sample mean

n=20 the sample size

Confidence=98% or 0.98

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 mean or variance 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.

The Chi square distribution is the distribution of the sum of squared standard normal deviates .

2) Calculating the confidence interval

The confidence interval for the population variance is given by the following formula:

\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}

On this case the sample variance is given and for the sample deviation is just the square root of the sample variance.

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

df=n-1=20-1=19

Since the Confidence is 0.98 or 98%, the value of \alpha=0.02 and \alpha/2 =0.01, and we can use excel, a calculator or a table to find the critical values.  

The excel commands would be: "=CHISQ.INV(0.01,19)" "=CHISQ.INV(0.99,19)". so for this case the critical values are:

\chi^2_{\alpha/2}=36.191

\chi^2_{1- \alpha/2}=7.633

And replacing into the formula for the interval we got:

\frac{(19)(16)}{36.191} \leq \sigma^2 \leq \frac{(19)(16)}{7.633}

8.400 \leq \sigma^2 \leq 39.827

So the 98% confidence interval for the variance in the pounds of impurities would be 8.400 \leq \sigma^2 \leq 39.827.

7 0
3 years ago
The perimeter of a rectangle is represented by 4x2 + 5x − 2. The perimeter of a smaller rectangle is represented by x2 + 3x + 5.
REY [17]
<span>4x2 +5x - 2 -x2 +3x +5 Simplified: 3x2 + 8x +3 In order to determine the difference in size, you must subtract the perimeter of the smaller rectangle from the perimeter of the larger rectangle.</span>
6 0
3 years ago
Read 2 more answers
What do the meter, liter, and gram all have in common?
Margaret [11]

Answer:

They are all the basic units of measure in the metric system

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
Find the length of the longer leg of a 30⁰-60⁰-90⁰ triangle given the length of the shorter leg: 15 in.
erica [24]

Answer:

longer leg is 30 inches

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • The amount of fat, in grams, in granola is proportional to the volume, in cups, of the granola as shown on graph.
    12·2 answers
  • Answer these question plz
    9·1 answer
  • Which characteristic guarantees that a parallelogram is a rectangle
    10·1 answer
  • A 12-ounce Pepsi contains 54 mg of caffeine. A can of Red Bull (8.2 oz) has 80 mg of caffeine.
    9·2 answers
  • Consider the line through (-1, -4) and (1, 2).<br>  What is the slope (m) of the line?<br>​
    9·1 answer
  • Rewrite 1/3 Barrel 2/3 hour as a unit rate
    7·1 answer
  • Angie bought 3 1/2 pounds of apples to make a pie. There are 16 ounces in one pound. How many ounces of apples did she buy?
    9·1 answer
  • About how many times larger is 9.8 x 10^8 than 5.2 x 10^5?
    13·1 answer
  • Does anyone know this ??
    7·1 answer
  • Apply the rule (-x, y - 2) to the following point, what is the result?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!