Answer:
The Average Temperature Of 45 Occurs Twice A Year. Find The Number Of Days After January 1 For Each Of These Occurrences.
Jamal planted 53 fewer flowers than Heidi. Write an expression to show how many flowers Heidi planted.
Answer:
y = x + 53
Step-by-step explanation:
Let x be the number of flowers Jamal planted and y the number of flowers Heidi planted.
Jamal planted 53 fewer flowers than Heidi:
x = y - 53
Isolate the y.
x + 53 = y (Change the - sign to + sign when switching from different sides of an equation)
y = x + 53
Answer:[tex]j=h-53[/tex]
Step-by-step explanation:
Let h be the number of flowers Heidi planted, and j the number for Jamal.
[tex]j=h-53[/tex]
(1) In an investigation of toxins produced by molds that infect corn crops, a biochemist prepares extracts of the mold culture with organic solvents and then measures the amount of the toxic substance per gram of solution. From 6 preparations of the mold culture, the following measurements of the toxic substance (in milligrams) are obtained:1.4, 1.5, 1.8, 1.9, 2.5, 2.2Find a 99% confidence interval for the mean weight (in milligrams) of toxic substance per gram of mold culture in the sampled population.(2) Which of the following statements is true regarding part (a)?(A) The population mean must be inside the confidence interval. (B) The population does not need to be normal. (C) The population must be normal. (D) The population standard deviation ? must be known. (E) The population must follow a t-distribution.
Answer:
Following arew the solution to this question:
Step-by-step explanation:
Build the 99% trust period of harmful chemicals for both the community, because no information is provided mostly on population standard, they just use t-test procedure to find the necessary trust period.
The confidence interval of 99 percent for both the mean community is provided by,
[tex](\bar{x} \pm t_{\frac{\alpha}{2}} \frac{s}{\sqrt{n}})[/tex]
Use Minitab as seen below to get the necessary result:
T study one: weight
Variable N Mean stDev SE Mean 99% CI
weight 6 1.883 0.417 0.170 (1.197, 2.569)
The overall population weight of a toxic material in the above output is 99 percent (1.197, 2.569).
They may say of the 99% trust interval, the 99% trust between about 1.197 mg and 2.569 mg will lie throughout the average population.
Therefore, the option (A) is valid
One of conditions would be that the overall population should be standard in attempt to discover the standard deviation. This is the true option (C).
Real easy probability problem please help!
What value of x solves the equation? -(-5x + 3) = 17 What value of x solves the equati
Step-by-step explanation:
-(-5x + 3) = 17
5x - 3 = 17
5x = 20
x = 4.
What is the area of a triangle whose vertices are D(3, 3), E(3, −1), and F(−2, −5)?
Answer:
10 units²
Step-by-step explanation:
HELP PLS ITS DUE IN 30 MINUTESSSS What is the equation of the line that crosses the y-axis at 2 and has a unit rate of 8/2?
Group of answer choices
y = 4x + 2
y = 2x + 2
y = 2x + 4
y = 4x -2
Answer:
the first one
Step-by-step explanation:
u still need explanation?
Please help
The number of students in a chess club decreased from 39 to 13. What is the percent decrease? Round your answer to the nearest percent.
Answer:
correct
Step-by-step explanation:
Answer:
u r correct
Step-by-step explanation:
The following books are on a shelf: 3 math, 8 reading, 7 science, 4 history. Find the
probability of grabbing reading or science (write your answer as a fraction)
Answer:
15/22
Step-by-step explanation:
There are 8 reading books and 7 science and 22 books in total so when you add 8+7 you get 15 and since there are 22 books in total you get 15/22.
This might be wrong because I was in a rush. Hope this helps though!
99x-99y=99 how to graph it
Answer:
Hope this helped!
Frank’s grandfather collected animal fossils. Over his lifetime his grandfather had collected three billion, two hundred ninety-seven million, fourteen fossils. His grandmother also collected things, but she collected arrowheads. She had collected nine hundred seventeen million, three hundred seventeen thousand, eight hundred ninety-two arrowheads. What was the difference in the amounts they collected?
Frank’s grandfather collected
more items.
Answer:
The grandfather collected 2,379,682,122 more
Step-by-step explanation:
3,297,000,014 - 917,317,892 = 2,379,682,122
Jayden used the multiplication table below to determine that 8:14 is equivalent to 24:42.
Which statement explains why Jayden’s reasoning is correct?
a. The ratio 8:14 is 4:7 times 2, and the ratio 24:42 is 4:7 times 6.
b. The terms 8 and 14 are multiples of 2, and the terms 24 and 42 are also multiples of 2 when the table is extended.
c. The term 24 is a multiple of the term 8, and the terms 14 and 42 are multiples of 7.
d. The ratio 8:14 is equivalent to 2:7, and the ratio 24:42 is also equivalent to 2:
Answer:
A please give me brainlest im sorry if its wrong i tried
Step-by-step explanation:
Answer:
the answer is D
Step-by-step explanation:
Just trust me
Through(-2,-3); parallel to 3x+2y=5
Step-by-step explanation:
Hey there!
Firstly find slope of the given equation.
Given eqaution is: 3x + 2y = 5.......(i)
Now;
[tex]slope(m1) = \frac{ - coeff. \: of \: x}{coeff. \: of \: y} [/tex]
[tex]or \: m1 = \frac{ - 3}{2} [/tex]
Therefore, slope (m1) = -3/2.
As per the condition of parallel lines,
Slope of the 1st eqaution (m1) = Slope of the 2nd eqaution (m2) = -3/2.
The point is; (-2,-3). From the above solution we know that the slope is (-3/2). So, the eqaution of a line which passes through the point (-2,-3) is;
(y-y1) = m2 (x-x1)
~ Keep all values.
[tex](y + 3) = \frac{ - 3}{2} (x + 2)[/tex]
~ Simplify it.
[tex]2(y + 3) = - 3x - 6[/tex]
[tex]2y + 6 = - 3x - 6[/tex]
[tex]3x + 2y + 12 = 0[/tex]
Therefore, the eqaution of the line which passes through the point (-2,-3) and parallel to 3x + 2y= 5 is 3x + 2y +12 =0.
Hope it helps...
I WILL GIVE YOU 30 POINTS!! ASAP PLZ
You use a line best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for your data set is -0.833. How confident can you be that your predicted value will be reasonably close to the actual value? Why or why not?
Answer:
no
Step-by-step explanation:
Write the following statement as a mathematical expression.
Let x be a number.
The quotient of two and a number, subtracted from seventeen
Answer:
17 - (2 / x)
Step-by-step explanation:
because it is being subtracted from 17. that goes first, and then x is being divided by 2.
Hope this helps!
Answer:
17 - (2 / x)
Step-by-step explanation:
i just did it and got a 100%
In a survey, 46 people, which was 20% of those surveyed chose red as their favorite color how many people were surveyed
Answer:
answer: 230
Step-by-step explanation:
20% is 1/5 of 100 so you multiply 46 by 5 and you get 230 people
hope this helps!!
100 POINTS!!!!!
5x + 1 over 2 y2
What is the value of the expression above when x = 3 and y = 2? You must show all work and calculations to receive full credit.
Answer:
Step-by-step explanation:
5(3)+1=
15+1
16
2(2)^2=
2(4)
8
16 over 8 = 2
Answer:
2
Step-by-step explanation:
2
find the slope and y-intercept of the line in the graph. Express the answers as simplified fractions, if necessary.
Answer:
y=1 3/5x+-5
Step-by-step explanation:
So the y intercept is where your slope meets the middle, basically the y. So it hit the y on -5. And the rise and run 8/5 rise is 8 and run is 5. 8/5= 1 3/5. in equation it is y=1 3/5x+-5.
What is the sign of the product of (-1/2) (-2/3) (-1/5) (-8/15) (-3/8)
Answer:
Decimal: -0.013333
negative
Step-by-step explanation:
name of the each shape below
0.00007547 in standard form
Answer:
it already is in standard form
Step-by-step explanation:
Answer:
7.5X10^5, I may be wrong.
Step-by-step explanation:
SOMEONE PLEASE ANSER THIS QUESTION ASAP!!!
Answer: 28
Step-by-step explanation:
5/8 m
Calculate the perimeter of a square with side length 5/8m
Give your answer as a mixed number.
Answer:
2.5 m
Step-by-step explanation:
perimeter of a square=side *4
5/8*4
5/2
2 1/2
Answer:
[tex]\boxed{2\frac{4}{8} }[/tex]
Step-by-step explanation:
Perimeter of a square = All 4 sides added up together
[tex]\frac{5}{8}+\frac{5}{8} +\frac{5}{8} +\frac{5}{8} = \frac{20}{8} =2\frac{4}{8}[/tex]
WILL GIVE BRAINLIEST if you show your work
Answer:
[tex]\frac{x-9}{4x}[/tex]
Step-by-step explanation:
The image below shows step-by-step on how to evaluate the expression.
Hope this help! :)
The heights of men in a survey are distributed normally about the mean.
Suppose the survey included data on 100 men. About how many would you expect to be 69−71 inches tall?
Answer:
43 men
Step-by-step explanation:
The expression 2y + 2.6 is equal to ? for y = 1.4
Answer:
5.4 :))
Step-by-step explanation:
ok so first you take 2*1.4=2.8 (you replace the Y with the number)
so now you have 2.8+2.6 which is equal to 5.4
Answer:
5.4
Step-by-step explanation:
2*1.4 is 2.8. Now the expression is y2+2.6=. Now, that we figured out what 2y is, which is 2.8, we need to add on 2.6. 2.6 + 2.8 is equal to 5.4. Now, to write out the whole equation, it would look like this.
2y+2.6=?
y2+2.6=?
2.8+2.6=?
5.4
So in the end:
2y+(2.6)= 5.4
Which equation does this graph represent?
Michael spends 3 hours cleaning his house. He spends equal amounts of time cleaning each room. If he spends 1/2 hour cleaning each room, how many rooms does his house have
Answer:
6 rooms
Step-by-step explanation:
3 hours= 60min*3= 180 min
180/30 min each room= 6 rooms
if u know that y=30 then what is y=4x-2
Answer:
x = 8
Step-by-step explanation:
y = 4x - 2
30 = 4x - 2
+ 2 + 2
32 = 4x
/ 4 / 4
8 = x
What is the value of the expression when a = -2, b = 3, and c = -6?
ab + 20
be
-1
1
how about this.
am I wrong??
I hope now is right.
help me plz this is my first doing slopes
