Ruben's score on the next test to raise his average (mean) to 77 is 89.
What is the average?The average is the quotient of the total divided by the number of items involved.
The average is also known as the mean.
The mean is one of the values of central tendency. Other values of central tendency include the mode and the median.
The number of biology tests taken by Ruben so far = 6
The mean score of the six tests = 75
The total score so far in the six tests = 450 (6 x 75)
The expected average for seven tests = 77
The total score for the seven tests = 539 (77 x 7)
The expected score for the seventh test = 89 (539 - 450)
Thus, Ruben is expected to score 89 for his average score to be 77.
Learn more about the average at https://brainly.com/question/20118982
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Hi all, please help me with this problem
(It's Algebraic Expression's!)
I suck in maths :/
Answer:
3rd side = 2x + 6y
Step-by-step explanation:
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What are the odds against choosing a green or red marble from a bag that contains two blue marbles, one green marble, seven white marbles, and four red marbles?
5:14
5:9
9:14
9:5
Answer:
Option #1 (5:14)
Step-by-step explanation:
The reason I chose option relies fully on these steps:
To find the ratio that represents the situation, you have to find the denominator of the fraction that the ratio itself represents:
5 : 14
9 : 5
To find this element you count the total number of objects that are in the problem:
2 + 1 + 7 + 4 = 14 total marbles to choose from - our denominator.
But what about the other number? That's our numerator, and we can find that by counting how many of the select possibilities - only counting the red and green marbles that may be chosen:
1 + 4 = 5
Therefore our denominator and numerator come together to form 5/14, which is equivalent to 5 : 14!
I hope this helped a bunch! Tell me if you need any further assistance...
( :
A tree 8 feet high casts a 4-foot shadow. At
the same time, a nearby building casts a 16-
foot shadow. What is the height of the
building?
Plz help someone it’s important
Answer:
I think it's 32
Step-by-step explanation
I've done these types of questions before but don't really remember how to do the process but I think you multiply 8 and 16 and divide by 4.
Transgender Children A study introduced in Exercise 6.106 examines the age at which transgender adults first experience feelings of gender dysphoria. In the study of 210 adults, the mean age at which they first remember feeling gender dysphoria was 6.6 years old with a standard deviation of 3.5 years. Find a 90% confidence interval for the mean age at which transgender people first begin sensing that they are transgender.
Answer:
HERESY
Step-by-step explanation:
Every year,the value of an antique vase appreciates by 20% of it's value in the previous year if the value of case was 180000 in 2012, find it's value in 2010.
guys I am giving you 100 POINTS!!!no cheating andd I need answer that is 125000 and send me with solution
Every year, the value of an antique vase appreciates by 20% of its value in the previous year. If the value of the vase was $180 000 in 2012, its value in 2010 was $125000
Step-by-step explanation:
Given the appreciation rate r, the initial value I, the final value V, and the period of appreciation n, the formula for appreciation is given by:
V = I(1 + r)ⁿ
In our case, we need to work out the value of n.
We do this as follows:
n =2012 - 2010 = 2 years
Substituting the values we have:
180000 = I(1.20)²
180000 = 1.44I
I = 180000/1.44
= 125000
So, in 2010, the value of the vase was $125000
PLEASE HELP ME ILL MARK BRAINLIEST !!!!! spam reported
Answer:
a) -4
b) +343
Step-by-step explanation:
a) 10 shares - loss $40
1 share --- ?
? = 40 / 10 = 4 decrease
b) each week 7 members increase for 49 weeks
so total increase = 7 * 49 = 343
9514 1404 393
Answer:
(a) -4 dollars
(b) +343 members
Step-by-step explanation:
(a) The change in the value of each share is the total amount of change divided by the number of shares:
change per share = (total change)/(number of shares)
change per share = (-40 dollars)/(10 shares) = -4 dollars/share
The change in value for each share was -4 dollars.
__
(b) As with most rate problems, the quantity is the product of rate and time.
growth = (7 members/week) × (49 weeks) = 7×49 members
growth = 343 members
The change in the club's size was +343 members.
What is the answer to 3(d − 7) = 6
[tex]3(d - 7) = 6 \\ \\ = > 3d - 21 = 6 \\ \\ = > 3d = 6 + 21 \\ \\ = > 3d = 27 \\ \\ = > d = \cancel \frac{27}{3} \\ \\ = > d = 9[/tex]
Hope This HelpsAnswer:
D = 9
Step-by-step explanation:
hope it helps
Sally needs to have some drywall and insulation work done in her house. She has received a quote from a professional drywall contractor to complete her repairs for $1,200. Her neighbor Steve says he can complete the same job for $800. Sally could use a credit card to pay the contractor, but Steve can only accept cash. Sally’s credit card has a 14% APR for credit purchases and a 32% interest rate for cash advances. Expecting to pay $50 of the principle plus appropriate interest each month, Sally estimates that it would take her 24 months to pay off the contractor balance and 16 months to pay off the cash advance balance.
In the end, would it be cheaper for Sally to hire the contractor or her neighbor to complete the repairs
Answer:
gawain sa pagkatuto bilang 2 balikan ang awiting bayan ko sa pahina 15 hanapin ang mga simbolong pangmusika sa awiting guhit ang mga nakita mong simbolong pangmusika sa iyong kwaderno
Answer:
For $1,200 at 14% for 24 months, Sally would be have to pay $57.62 per month, or $1,382.88 after 24 months. Neighbor Steve: For $800 at 32% for 16 months, Sally would have to pay $62.08 per month or $993.28 after 16 months. Even with the (much) higher interest rate, Sally would pay $389.60 less if she went with Neighbor Steve. Even better is that the monthly payments would be about the same for the given timelines. Sally would still want to weight the benefits of contracted work vs. non-contracted work.
Step-by-step explanation:
Need answer ASAP
You buy a TV for $256 and a DVD player for $46. If the sales tax rate is 6.5% how much is the sales tax on this purchase to the nearest penny?
Answer:
$19.63 would be the sales tax on this
Please explain this to me please
Will give brainly if you actually answer the questions
Answer:
17. D
18. B.
Step-by-step explanation:
m= (y2-y1)/(x2-x1)
m= (5--2)/(-3--2)
m = -7
sub x=-2 ; y = -2
y= mx+c
y= -7x+c
-2=-7x+ c
c= -16
y= -7x-16
2.26-30 3x+y=6
(0,_)
(_,0)
(3,_)
(6,_)
(5,_)
Answer:
Step-by-step explanation:
In ordered pairs (a,b) a is the x value and b is a y value.
if we have 3x+y=6
if x=0, y=6 --> (0,6)
if y=0, x=2 -->(2,0)
if x=3, y=-3--> (3, -3)
if x=6, y= -12 --->(6, -12)
if x=6, y= -9 ---> (5, -9)
solve the inequality for x
-2x + 2 < -8
Answer:
Step-by-step explanation:
x<-3
Rearrange the equation by subtracting what is to the right of the greater than sign from both sides of the inequality: 2*x-2-(-8)<0
1) Pull out like factors : 2x + 6 = 2 • (x + 3)
2) Divide both sides by 2
3) subtract 3 from both sides x<-3
(I’ll give brainliest) Can someone help with these math vocab questions?
Answer:
proportional is the answer
Last Tasha a 90 fries in 18 minutes find her fry eating right and fries per minute
Answer:
5
Step-by-step explanation:
90 fries in 18 minutes. You would divide 90 by 18 to get the answer of 5 fries per minute.
Graph AFGH with vertices F(-2,2), G(-2,-4), and H(-4,-4) and its image after the similarity transformation.
Rotation: 180° about the origin
Dilation: center (2,-2) and k = 2
Answer:
i think its 5
Step-by-step explanation:
im not sure if its 5 or not but im guessing
The length of a rectangular garden is 7 feet longer than its width. The garden's perimeter is 190 feet. Find the width of the garden.
Answer:
The width of the garden is 44 feet.
Step-by-step explanation:
A rectangular shape has 4 sides, so the perimeter would be x + x + y + y. We know that the total is 190 feet, and the length is 7 feet longer than the width.
Let x be the width of the rectangle.
Let y be the length of the rectangle; (y = x + 7)
Equation: 190 = x + x + y + y
190 = x + x + (x + 7) + (x + 7)
Combine like terms: 190 = 4x + 14
Find x: 190 - 14 = 4x, 176 = 4x, x = 44.
44 feet is the width of the garden.
Check: 44 + 44 + (44 + 7) + (44 + 7) = 190
I REALLY NEEP HELP RN
Which of the following is the difference between a permanent magnet and an electromagnet?
An electromagnet can be turned on and off, but a permanent magnet cannot.
A permanent magnet has a north and south pole, but an electromagnet does not.
Their strength can be changed.
Answer:
An electromagnet can be turned on and off, but a permanent magnet cannot.
It's the first Option since all mangnets will always have north and south pole
A busy customer service agent handled 20 emails in
1
4
of a day. At that rate, how many emails could he handle in 1 day?
Answer:
80 emails
Step-by-step explanation:
20=1/4
40=2/4
60=3/4
80=4/4
80 emails in 1 day
20 times 4 = 80
A line passes through the point (-8, 5) and has a slope of 5/4. Write an equation in slope-intercept form for this line.
Answer:
5/48
Step-by-step explanation:
Evaluate the expression when x=14 and y=12.
2(116+x2)+5y
Enter your answer as a mixed number in simplest form in the box.
I NEED A ANSWER QUICK
Answer: 348
Step-by-step explanation:
Answer:it is 2 3/4
Step-by-step explanation:i took the test
✨
At which angle will the hexagon rotate so that it maps onto itself ?
Answer:
There are 6 angles between neighbour vertices, they all are equal (because a hexagon is regular) and their sum is 360°. Thus each angle has a measure of 360°/6=60°. Each subsequent rotation by 60° also maps a hexagon onto itself.
Step-by-step explanation:
Answer:
Step-by-step explanation:
Please help me with this, it’s due today!
Answer:
hello i am new to brainly. i am new to this app im just trynna figure this app
Step-by-step explanation:
I need helpppp ahhhh
Answer:
x=-4
Step-by-step explanation:
[tex]\frac{1}{2}[/tex](4x-6)+x-3=2(x-5)
2x-3+x-3=2x-10
3x-6=2x-10
3x-2x=-10+6
x=-4
What is (8/9)divided by (6/7) and simplified
Answer:
(28/27)
Step-by-step explanation:
Answer:
Exact Form:
28/27
Decimal Form:
1.037
Mixed Number Form:
1 1/27
Step-by-step explanation:
Question 3 (1 point)
If you deposit $400 into an account that offers a 5% interest rate. How much
interest will you earn after 1 year?
$20
$350
$160
$2
Question 4 (Mandatory) (1 point)
A linguistics expert is interested in learning about the amount of time people in his industry spend studying a new language. A random sample of 15 people in his industry were surveyed for a hypothesis test about the mean time people studied a new language last year. He conducts a one-mean hypothesis test, at the 10% significance level, to test the recent publication that the amount of time people in his industry are studying a new language was 30 minutes per week.
df t0.10 t0.05 t0.025 t0.01 t0.005
...... ... ... ... ... ...
1313 1.350 1.771 2.160 2.650 3.012
1414 1.345 1.761 2.145 2.624 2.997
1515 1.341 1.753 2.131 2.602 2.947
1616 1.337 1.746 2.120 2.583 2.921
Determine the critical value(s) using the partial t−table above.
Answer:
Step-by-step explanation:
1.761
I need a answer pls help me
Answer:
y = 2.5x
Step-by-step explanation:
Note where all the points are.
When x = 0, y = 0
When x = 2, y = 5
When x = 8, y = 20
You simply need to find how much "y" is for each "x". Divide y with x:
5/2 = 2.5
Check. Plug in the x, and obtain the y:
y = 2.5x
y = 2.5(4) = 10 (True).
y = 2.5(8) = 20 (True).
~
Write a quadratic equation with 3/2 and 1/4 as its roots. Write the equation in the form ax2+bx+c=0, where a, b, and c are integers. PLEASE HELP AND SHOW ALL YOUR WORK ILL MARK BRAINLIEST
Answer:
8x^2 -14x +3 = 0
Step-by-step explanation:
The sum of the roots is (3/2) +(1/4) = (6/4 +1/4) = 7/4.
The product of the roots is (3/2)(1/4) = 3/8.
The quadratic can be written as ...
x^2 -(sum of roots)x +(product of roots) = 0
x^2 -7/4x +3/8 = 0
Multiplying by 8 makes all of the coefficients be integers:
8x^2 -14x +3 = 0
1. Describe the difference between a relation and a function.
Answer:
The difference between a relation and a function is that a relationship can have many outputs for a single input, but a function has a single input for a single output. This is the basic factor to differentiate between relation and function. Relations are used, so those model concepts are formed.
Are fractions reversible? why or why not
Answer:
Yes
Step-by-step explanation:
if you think of a slope equation, for example y= 3x + 2, if you do the opposite reciprocal, you would get-1/3 because you flip it around, and you flip the sign.
