Answer:
[tex]-\frac{106}{5} or -21.2[/tex]
Step-by-step explanation:
First we would have to get x and y-values by solving systems of equations:
isolate one of the variable from any of the first 2 equations given:
-2x+ y =6 would be y = 2x + 6 when y is isolated.
now plug this equation in for the y given in the second equation:
-7x -4(2x + 6) = -8
Now solve to get the x-value,
-7x - 8x - 24 = -8
-15x - 24 = -8
-15x = 16
x = [tex]-\frac{16}{15}[/tex] or -1.06
To solve for y-value, substitute the gotten x-value in any of the 2 equations and solve:
y = 2([tex]-\frac{16}{15}[/tex]) + 6
y = [tex]\frac{58}{15}[/tex] or 3.86
Now that we have the x and y-values, substitute them in for the 3 equation given:
-9([tex]-\frac{16}{15}[/tex]) -3( [tex]\frac{58}{15}[/tex])
=> [tex]-\frac{106}{5}[/tex] or -21.2 = Final Answer
Hope this helps!
Which of the following represents the area of a rectangle whose length is 3x + 5 and whose width is. x – 2?.
A.) 3x^2 + x – 10
B.) 3x^2 – 10
C.) 3x^2 – 11x – 10
D.) 3x^2 – x – 10
What is the quotient? 7 negative ⁵/7² A. 1/7⁸ B. 1/7³ C. 7³ D. 7⁸ PLZ HURRY
Answer:
1/(7^7)
Step-by-step explanation:
What is 6 x 1 1\4 in fractions
HELP ME PLEASEEEEEEEEEEE
Answer: g=8
Step-by-step explanation: Hope this help :D
A sample of restaurants in a city shows that the average cost of an appetizer is $6.32 with a standard deviation of $0.47. A brand new restaurant wants to get noticed by offering appetizers for a much lower price. To determine the lower price, should the formula use a z-value that is greater than or less than -1?
a.
Greater than -1
c.
Greater than 1
b.
Less than -1
d.
Either way, it doesn’t matter
Answer:
D
Step-by-step explanation:
Is the corrext answer hope it helps
By using a z-value less than -1, we can find a price that is significantly lower than the average cost, and therefore more likely to attract customers.
Option B is the correct answer.
What is a standard deviation?Standard deviation is a measure of the amount of variability or spread in a set of data.
It is calculated as the square root of the variance and is often denoted by the symbol σ (sigma) for a population and s for a sample.
We have,
The z-value formula is used to determine the number of standard deviations a data point is from the mean.
To determine the lower price of appetizers, we want to find a price that is significantly lower than the average cost.
Since the new restaurant wants to offer appetizers for a much lower price, we should use a z-value that is less than -1, which indicates a price that is more than one standard deviation below the mean.
Recall that the z-value formula is:
z = (x - μ) / σ
where x is the value of interest, μ is the mean, and σ is the standard deviation.
Thus,
By using a z-value less than -1, we can find a price that is significantly lower than the average cost, and therefore more likely to attract customers.
Learn more about standard deviation here:
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Each triangular face of the following solid figure is congruent. If the area of each face is 12 square inches, what is the
surface area of the entire figure?
Answer:
the surface area is 48in^2 because there are 4 faces and you have to find the surface are in which you must multiply 12 by 4.
Step-by-step explanation:
Amy knits 1/10 of a scarf in 4/5 of an hour. What fraction of scarf can Amy knit in 1 hour
Answer:
Amy can knit [tex]\frac{1}{8}[/tex] of a scarf in 1 hour.
Step-by-step explanation:
This question can be solved by proportions, using a rule of three.
We have that:
1/10 of a scarf - 4/5 of an hour
x of a scarf - 1 hours.
Applying cross multiplication:
[tex]\frac{4x}{5} = \frac{1}{10}[/tex]
[tex]x = \frac{5}{10*4} = \frac{5}{40} = \frac{1}{8}[/tex]
Amy can knit [tex]\frac{1}{8}[/tex] of a scarf in 1 hour.
Need help pls help will gift extra points if help plz explain how you soved it
Answer:
both 125° and the 5x+30 are congruent to eachother. therefore you can go
5x+30=125
subtract 30 from both sides.
5x=95
then divide both sides by 5
x=19
PLEASE HELP ME I CAN'T FAIL THIS, JUST 2 QUESTIONS!!
What is the volume of the composite figure if both the height and the diameter of the cylinder are 3.5 feet? Give the exact answer and approximate to two decimal places.
Find the height in centimeters of a square pyramid with a volume of 455cm3 and a base edge length equal to the height. Give the approximate answer rounded to 2 decimal places.
PLEASE SHOW YOUR WORK
ms. irwin teaches four periods of weight training. she required each student in thr class to record the maximum amount of weight lifted for the squat. based upon the data listed below, which period had the greatest mean score?
period 1 : 100, 100, 125, 125, 130, 130
period 2 : 90, 125, 125, 130, 135, 135
period 3 : 90, 90, 100, 125, 125, 125
period 4: 90, 90 , 90, 100, 100, 125
a. period 1
b. period 2
c. period 3
d. period 4
Answer:
a
Step-by-step explanation:
Please mark brainliest
What the answer to 7+8=
Helpppp pleaseeee please pretty please NO LINKS OR I WILL REPORT YOU please give an explanation I will mark brainliest
Answer:
A: 88 square inches
Step-by-step explanation:
trust me
Answer only if you know if you put links I will report
Answer:
WHATS THE QUESTION, BRO??
Step-by-step explanation:
what are the answers for these two questions? please also tell me HOW you got that answer
9. Multiply the money he has by the portion he spent:
75 x 3/5 = (75 x3)/5 = 225/5 = 45
He spent $45
10. First rewrite 4 1/8 as an improper fraction
33/8
Now multiply by 1/3:
33/8 x 1/3 = (33 x1) /(8 x 3) = 33/24 = 1 3/8
She spent 1 3/8 hours studying math.
There are 39,945 people in a baseball stadium.
4,130 are rooting for the away team, and the rest
are rooting for the home team. Enter the number
of people who are rooting for the home team.
Answer:
35815
Step-by-step explanation:
just subtract
Answer:
35,815 people rooted for the home team.
Step-by-step explanation:
Subtract the total people watching by the people rooting for the away team.
39,945 - 4,130 = 35,815
Hope this helps! :)
help me please i need answer
Answer: 57.75 m
Explanation: First do 5 times 0.25. (The 0.25 is the same as 1/4.) Now take that answer and multiply it by 11. Your equation should look like this: 11*(5 1/4).
* = times
I hope this helps! :)
This is the first year Janis is playing softball. She has been practicing her batting. On her last swing the bat made an arc with a radius of 49 inches and swept
through 283 of rotation. Assuming the arc is circular, what is the distance the tip of the bat travels to the nearest inch?
Answer:
2*pi*49*283/360=242 (to the nearest inch)
the distance the tip of the bat travels 242 inches.
NO Links OMG
I need help in these 4
help!!!!!!!!
Answer:
7- 780 m
8- 9,459 cm
9- 864 cm
10- 151 in
Step-by-step explanation:
7- The volume of a rectangular pyramid is:
V=(l x w x h) / 3We just have to substitute the values:
V= 13×12×15 / 3V= 780 m8- The volume of a cone is:
V=hπr² / 3Let's substitute the values and solve:
24×π×19.4² / 39,458.9If you want to round it, the answer will be:
9,459 cm9- The volume of a square pyramid V = a²h / 3, where a is the base and h the height.
So,
V= 12²×18 / 3864 cm10- The volume of the cone is V = hπr² / 3
Then,
V= 16×9×π / 39 is the diameter, which is the radius two times. As you see, what the formula asks is for the radius at the second power -multiplied by itself two times-, but if we get the diameter value instead, there is no need to multiply it. The diameter stays the same.
V= 150.7If you want to round it to the nearest tenth, the answer is:
151 in.Hope this helps!!
what is 95.03317777 to 1 decimal place
i think it is 95.0 so 95
Hope this helped :T
It is 186 miles from Sergio's house to his parents' house.
Twice a year, he drives to visit them.
Then he drives home.
How many miles does he drive on the two round-trips?
ANSWER CHOICES-
372 miles
424 miles
724 miles
744 miles
Answer:
Step-by-step explanation:
He drives double the distance from his house to his parents house.
Answer:
answer: 744
Step-by-step explanation:
He drives 744 because 186 × 4 = 744 because its 186 to go there then 186 to go back then 186 to go there then 186 to go back so that adds up to 744 Hope that helps!
please help middle school math I will mark brainliest (picture included so it could be a little easier)
Point P is plotted on the coordinate grid. If point S is 12 units to the left of point P, what are the coordinates of point S? 10 NAG -12-10-864 -20 32 2 4 6 8 10 12 TP -6 -S 10 - 12 (6.-16) (-6.-16) o(-6,-4) (6,4)
Answer:
(-6, -4)
Step-by-step explanation:
Original coordinates: (6, -4)
POINT S IS 12 UNITS TO THE LEFT OF POINT P.
There are multiple ways to solve this, but I will explain the easiest way.
We can subtract 12 from the x-coordinate.
This because the x-axis runs RIGHT and LEFT.
The y-axis runs UP and DOWN.
6 - 12 = -6
The y-coordinate stays the same.
The new coordinates are: (-6, -4).
im a boy im in 7th grade 13 years old and single i need some help
single too and 13 I can't help bc I ain't smart
Quick question, so if I put a certain or any amount of points for a question will they be deducted from my points?
Also what happens if I have 0 points, can I no longer ask people questions?
Here's a free 30pts btw.
Answer:
if u have o points u have to answers people questions correctly u can't ask people for questions u need a 10 point then u can but no points me no answers
Answer:
Yes, they will be deducted from your own points. If you have zero points you will no be able to ask questions because the minimum points it is to ask a question is 10 points, but you can always gain points by answering others questions :D
Step-by-step explanation:
Hope this helped! Thank you for the points :)
Find the value of x.
2x 1250
160°
110°
to
147°
112°
X =
Answer:
789
Step-by-step explanation:
7 ate 9
Ariel and Eric dance in the village. Soon, others join in. Knowing that there are 130 toes, how many dancers are there?
- 30 people
- 10 people
- 13 people
- 3 people
Answer:
13 dancers
Step-by-step explanation:
Since each human has 10 toes, and there are 130 toes,
[tex]\frac{130}{10}=13[/tex]
So, there are 13 people dancing.
A Biology teacher wants to see if there is any difference in the abilities of students enrolled in biology today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information. Today Five Years Ago 81 85 σ 14.5 8.5 n 81 36 The point estimate for the difference between the means of the two populations is
Answer:
The point estimate for the difference between the means of the two populations is x1`-x2`= 81-85=-4 where x1` is the mean of the of the first population and x2` is the mean of the second population.
Step-by-step explanation:
The data given is
Today Five Years Ago
X` 81 85
σ 14.5 8.5
n 81 36
The point estimate for the difference between the means of the two populations is x1`-x2`= 81-85=-4 where x1` is the mean of the of the first population and x2` is the mean of the second population.
The test statistics that will be used is
Z= x1-x2/ √σ₁²/ n₁ + σ₂²/n₂
Z= 81- 85/ √14.5² /81 + 8.5² /36
z= -4/√210.25/81+ 72.25/36
z= -4/2.1454
z= -1.8644
A brand of uncooked spaghetti comes in a box that is a rectangular prism with a length of 10 inches, a width of 3 inches, and a height of 4 1/2 inches. What is the surface area?
Answer:
The surface area is 177 square inches
Step-by-step explanation:
Given
[tex]Length = 10[/tex]
[tex]Width = 3[/tex]
[tex]Height = 4\frac{1}{2}[/tex]
Required
The surface area
This is calculated as:
[tex]Area = 2 * (Length * Width + Length * Height + Width * Height)[/tex]
So, we have:
[tex]Area = 2 * (10* 3+ 10* 4\frac{1}{2}+ 3* 4\frac{1}{2})[/tex]
[tex]Area = 2 * (30+ 45+ 13\frac{1}{2})[/tex]
[tex]Area = 2 * (88\frac{1}{2})[/tex]
[tex]Area = 177[/tex]
To convert a distance of 13,000 feet to miles, which ratio could you multiply
by?
Answer:
2.46212121 miles
-
convert a mile measurement to a foot measurement, multiply the length by the conversion ratio. The length in feet is equal to the miles multiplied by 5,280
The mile, sometimes the international mile to distinguish it from other miles, is the British imperial unit and the US customary unit, both systems are based on the older English unit of length equal to 5,280 feet, or 1,760 yards, and standardised as exactly 1,609.344 metres by international agreement in 1959
To convert 13,000 feet to miles, you can multiply it by the ratio of 1 mile / 5,280 feet.
To convert a distance of 13,000 feet to miles, you can multiply it by the conversion factor of 1 mile divided by 5,280 feet.
We know that
1 mile= 5280 feet
Then we will use the ratio of 1 mile / 5,280 feet, the numerator 1 represents the equivalent distance in miles, and the denominator 5,280 represents the equivalent distance in feet.
So, 13000 feet x 1 mile/ 5280 feet
= 13000/ 5280
= 2.462121212121212 miles
Therefore, to convert 13,000 feet to miles, you can multiply it by the ratio of 1 mile / 5,280 feet.
Learn more about Unit Conversion here:
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Helppppppppppp!!!!! Please
Answer:
The answer is C.
Step-by-step explanation:
angle 5 and 4 makes a line which is 180 and since angle 5 equals 57 , 180-57=123.
Find the Volume of the figure
Answer:
1920 cm³
Step-by-step explanation:
V = w · h · l
V = 8 · 14 · 10
V = 1120 cm³
Now for the smaller one.
V = w · h · l
V = 8 · 10 · 10
V = 800 cm³
1120 cm³ + 800 cm³
1920 cm³
Answer:
1920 cm ^3
Step-by-step explanation:
find the volume of the 2 cuboids seperatly.
bigger one: LXWXH --> 8 X 14 X 10 = 1120
smaller one: LXWXH --> 10X10X8 = 800
add them up
1120 + 800 = 1920 cm
Hope this helps :D