Answer:
x = -27
Step-by-step explanation:
Apply the Distributive Property to 5(x - 4): 5x - 20.
Then we have 5x - 20 + 3x - 9x + 7.
Combining like terms, we get -x = 7 + 20 = 27, so that x = -27.
PLZZZZZZZZ HLPPPPPPPPP MEEEEEEEEEEEE
Answer:
D.8
Step-by-step explanation:
A cube's volume is basically the side length multiplied by itself 3 times, so if it was increased by a factor of 2, it would mean 2x2x2 which equals 8.
You estimate that there are 64 marbles in a jar. The actual amount is 46 marbles. Find the percent error. Round to the nearest tenth of a percent if necessary.
Answer:
percentage error = 39.1%
Step-by-step explanation:
You estimate that there are 64 marbles in a jar. The actual amount is 46 marbles. Find the percent error. Round to the nearest tenth of a percent if necessary.
Given that You estimate that there are 64 marbles in a jar.
The actual amount is 46 marbles
Actual marbles = 46
Your estimate = 64
[tex]\% error =\frac{estimated - actual}{actual}[/tex]
% error = | estimate - actual | / actual × 100%
estimate amount - actual amount = 64 - 46 = 18
[tex]= \frac{18}{46} \times 100\\\\=0.391\times 100\\\\=39.1 \%[/tex]
Therefore, percentage error = 39.1%
Use the parabola tool to graph the quadratic function f(x)=(x−2)(x−6). Graph the parabola by first plotting its vertex and then plotting a second point on the parabola.
Answer:
Step-by-step explanation:
(x-2)(x-6)= x^2-8x+12
vertex (4,-4)
Answer:
Step-by-step explanation:
At the beginning of a population study , a city had 370,000 people. Each year since the population had grown by 7.9%. Let t be the number for years since start of the study. Let y be the city’s population. Write an exponential function showing the relationship between y and t
Answer:
Population = starting population * ( 1 + rate) ^ years
y = 370,000 * (1.079) ^ t
Step-by-step explanation:
find the area of the shape below
Answer:
The figure is a composite shape.
Theres 1 triangle and 1 rectangle
The formula to find the area of the triangle is 1/2 x base x height
1/2 x 7 x 3 = 10.5 units^2
The formula to find the area of the rectangle is base x height
7 x 3 = 21 units^2
Then add up all the areas to find the area of the entire shape.
10.5 units^2 + 21 units^2 = 31.5 units^2
plz mark brainliest if this helped :)
Which ratio is also equal to StartFraction R T Over R X EndFraction and StartFraction R S Over R Y End Fraction?
Answer:
ST/XY
Step-by-step explanation:
(RT/RX)/(RS/RY)= ST/XY
if the shapes are equal and the same then the ratio are equal
if RT is corresponds to RX and RS is corresponds to RY then TS corresponds to TS
Dorinda worked 2 part- time jobs and earned $234.50 for working a total of 30 hours at both jobs. She is paid $7.50 per hour at Job A and $8.00 per hour at Job B. How many hours did Dorinda work at Job A?
Answer:
Dorinda worked at Job A for 11 hours
Step-by-step explanation:
Step one
This is a word that leads to simultaneous.
Let us begin by modeling the system of equation from the problem
Let x and y be the number of hours worked in both jobs A and B respectively
Step two
x+y=30---------1
7.5x+8y=234.50----2
Solving the equations simultaneously we have
1. Multiplying equation 1 by 8 and equation 2 by 1 and subtracting from equation 2 to find y
8x+8y=240---------1
- 7.5x+8y=234.50----2
=0.5x=5.5
x=5.5/0.5
x= 11hrs
Substituting x=11 in equation 1 we can find y
11+y=30
y= 30-11
y= 19hrs
i need help asap pllz help !!
Answer:
14/28
Step-by-step explanation:
14/28 reduces down to 1/2
The data set below shows prices for concert tickets in 10 major cities. Find the interquartile range (IQR) of the set. How do the middle 50% of the prices vary?
Answer: IQR = 16
Step-by-step explanation:
Given the following data:
Cost of concert :
CITY : Q, R, S, T, U, V, W, X, Y, Z
Price : 35,36,42,38, 24,29,25, 44,49, 26
Interquartile range (IQR) = Q3 - Q1
Where,
Q3 = the upper quartile
Q1 = lower quartile
Rearranging the data:
24,25,26,29,35,36,38,42,44,49
Q3 = 42
Q1 = 26
IQR = (42 - 26) = 16
Answer:
18 (for the IQR)
Step-by-step explanation:
Well, follow the equation the other person did. You'd get the right answer if you do the stuff right. And for people where it has another part to it, the answer would be D.
I hope this helps :)
Marjorie needs to cut 7 yards of fabric into sections that are 7 of a yard long. How many sections will she be able to cut from the
fabric?
A
2
B.
14
C.
6/7
D.
49
｡☆✼★ ━━━━━━━━━━━━━━ ☾
So she needs sections that are 1/7th of a yard long
There are 7 'sevenths' in one yard
Multiply this value by the number of yards:
7 x 7 = 49
The answer would be D. 49
Have A Nice Day ❤
Stay Brainly! ヅ
- Ally ✧
｡☆✼★ ━━━━━━━━━━━━━━ ☾
Priya asked each of five friends to attempt to throw a ball in a trash can until they succeeded. She recorded the number of unsuccessful attempts made by each friend as: 1, 8, 6, 2, 4. Priya made a mistake: The 8 in the data set should have been 18. How would changing the 8 to 18 affect the mean and median of the data set
Answer: The mean will increase and the median would not change
Step-by-step explanation:
Recorded data by Priya :
Data: 1,8,6,2,4
Mean of data = (1+8+6+2+4)/5
=21/5 = 4.2
Median of data = 1,2,4,6,8
Median = 4
Correct data: 1,18,6,2,4
Mean of data = (1+18+6+2+4)/5
=31/5 = 6.2
Median of data = 1,2,4,6,18
Median = 4
Therefore ; according to the evaluation above, the median will remain unchanged, but the mean increased from 4.20 to 6.20.
Pls help me solve :The salary of a man was increased in the ratio 40:47. Calculate the percentage increase in the salary A. 85.1%. B. 58.5%. C. 17.5%. D. 14.9%
A high school coach wants to buy new shirts for the 25 members of the track team. The coach must spend less than $300 on the shirts and needs to figure out how much he can spend per shirt, s.
Answer:
$12 per shirt
Step-by-step explanation:
$300/25=$12
Answer:
11.96 per shirt
Step-by-step explanation:
299/25 = 11.96 you do this instead of 300/25 because it says less than 300
Which polygons are similar? 3 4 2 1 If someone can help me with this and as fast as possible i would amazingly appreciate it
Answer:
1 and 4
Step-by-step explanation:
1 and 4 are similar
have 3 congruent angles
use the two graphs to help complete the statements below.
Answer:
graph a: $10 dollars an hour
graph b: 10
Step-by-step explanation:
slope is calculated by rise over run ([tex]\frac{rise}{run}[/tex]) which means how many the line goes up divided by how many the line goes over (to the right)
negative slope is how many the line goes down divided by how many the line goes over (to the right)
What was the ORIGINAL price of an item that cost $55.50 AFTER a 75%
discount? *
Answer:
$222
Step-by-step explanation:
Julie needs to cut 4 pieces of yam, each with the same length, and a piece of yarn 7.75 inches long. Let x represent the
length of each of the equal pieces of yarn that Julie decides to cut. What is the equation that can be used to determine the
total length of all of the yarn that she ends up cutting, y is the graph of the equation continuous or discrete?
Answer:
She has to cut another piece = 7.75 inches
Total length = 4x + 7.75
This is what y represent, so
y = 4x + 7.75
The graph of the equation is continuous
Find the area of the shape below
Answer:
32 units^2
Step-by-step explanation:
This is a trapezoid
The area of a trapezoid is found by
A = 1/2 (b1+b2) h
A = 1/2 ( 4+12) *4
A = 1/2 (16) *4
A =32
Answer:
I think the answer is 32.!
Step-by-step explanation:
Anyone please correct me if I'm wrong.
I would divide the 12 into 3 to get 4 for the 3 parts.
I will start with the triangle on the left 4 times 4=16. Divide it 1/2, which you get 8.
On the triangle on the right is the same, so 8.
The middle is 4 times 4=16.
Last 8+8+16=32.
I think the answer is 32 units.!
Given r=2, s=5, t=8; what is 12s - 2rt + 101?
Given:
r = 2s = 5t = 8To find out:
Find the value of 12s - 2rt + 101?
Solution:
12s - 2rt + 101
=> 12 × 5 + 2 × 2 × 8 + 101
=> 60 + 32 + 101
=> 92 + 101
=> 193
2x - 2y + z= -7
-x + 3y + 2z = 0
x - 4y - 3z= 1
Answer:
Step-by-step explanation:
I used Cramer's Rule to find y, since we can isolate and solve for individual variables using Cramer's Rule. Do that by finding the determinant of the matrix, |A|. The matrix A looks like this:
2 -2 1
-1 3 2
1 -4 -3
and we find the determinant of a 3x3 by expanding it. Do that by picking up the first 2 columns and throw them on at the end, like this:
2 -2 1 2 -2
-1 3 2 -1 3
1 -4 -3 1 -4
and find the determinant by multiplying along the 3 major axes and subtract from that the product of the 3 minor axes:
[(2*3*-3)+(-2*2*1)+(1*-1*-4)] - [(1*3*1)+(-4*2*2)+(-3*-1*-2)] which simplifies to
-18 - (-19) = 1
So the determinant of the matrix A is |A| = 1.
Now to find the determinant of Ay, we replace the y column with the solutions and so the same thing by expansion and then multiplying and subtracting:
2 -7 1 2 -7
-1 0 2 -1 0
1 1 -3 1 1
and find the determinant of y:
[(2*0*-3)+(-7*2*1)+(1*-1*1)] - [(1*0*1)+(1*2*2)+(-3*-1*-7)] which simplifies to
-15 - (-17) = 2
So the detminant of y is |Ay| = 2
We can solve for the variable now by dividing Ay by A:
2 / 1 = 2
So the solution for y = 2
Work out the Find the area of the isosceles triangle with sides of 13cm and a base of 10cm. Show your workings
Answer:
60 cm²
Step-by-step explanation:
a=c= 13 cm
b= 10 cm
A=?
------------
A=bh/2
h is the leg of the right triangle with hypotenuse 13 cm and other leg 10/2 cmh= √13²-5²= √169-25= √144= 12 cmA= 10*12/2= 60 cm²Three people become infected with a virus that spreads quickly. Each day that passes, the number of infected people doubles. How can the number of infected people be determined from the number of days that have passed?
Answer: raise 2 to the number of days, and then multiply this value by 3.
Step-by-step explanation:
Answer: D
Step-by-step explanation:
A patient was given medicine. She took 5 ml of
medicine 3 times in one day. How much medicine did
she take in total that day?
Answer:
15 ml.
Step-by-step explanation:
That is 3 * 5 ml = 15 ml in one day.
Answer:
h9978y
Step-by-step explanation:
A softball pitcher pitches a ball at a speed of 74 miles per hour. What conversion factor can be used to find the speed of the ball in feet per second?
Answer:
5280 ft
-----------
1 mile
Step-by-step explanation:
We need to convert miles to feet and hours to seconds
1 mile = 5280 ft
and
1 hours = 3600 seconds
5280 ft
-----------
1 mile
1 hour
----------
3600 seconds but since this isn't an option
Coleen, had a choise between 3/10 of a bag of candy or 3/6 of a bag of candy.if she want to get as much candy as possible, which one should she choose?
Answer:
3/6 of a bag of candy
Step-by-step explanation:
When you do butterfly method, u may have learned or not but u do.
3/10, 3/6
and you multiply across
So, 6x3=18 and 10x3=30
and 3/6 has a higher value, so its correct
A Roth IRA is advertised to pay 1.5% annual interest. You researched the rate of inflation to be 1.15% this year. What is the actual or real rate of return on the IRA?
Answer: 0.35%
Step-by-step explanation:
Given the following :
Advertised interest rate = nominal rate = 1.5%
Inflation rate = 1.15%
The real rate of return is calculated by:
[(1 + nominal rate) / ( 1 + inflation rate)] - 1
[(1 + (1.5/100)) / (1 + (1.15/100))] - 1
[(1 + 0.015) / ( 1 + 0.0115)] - 1
[ 1.015 / 1.0115] - 1
1.0034602 - 1 = 0.0034602
Real rate of return = (0.0034602 * 100)%
Real rate of return = 0.346%
Answer: 0.35%
Step-by-step explanation:
Find the 7th term of the arithmetic sequence. 2, 13, 24, 35, 46,...
Answer: 68
Step-by-step explanation: Each time the number goes up by 11, you can just add 22 ( 2 more steps to the sequence) to the last one given to get the 7th term
how do I find the angles of a triangle when given all the lengths and no angle?
Given: cos∅ =-4/5 , sinФ = -12/13 , ∅ is in the third quadrant, and Ф is in the fourth quadrant. Evaluate Sin(∅+Ф)
Answer:
63/65
Step-by-step explanation:
the angles are in fourth and third quadrants so all the sin and cos values are minus
When answering pls write the number of the question ur doing that will be amazing thank u soo much
Step-by-step explanation:
No. 1
sin33° = x / 14
No. 2
Sin Z = 36.87°
No. 3
A = 62
No. 4
C = 36.87°
Hope this helps :)
Answer:
36.87
Step-by-step explanation: