Answer:
She should use 32.5 g of the sample that contains 14%
Step-by-step explanation:
Here, we want to know the number of grams of the sample that contains 14% copper that should be used
let the number of grams that contains 14% copper to be used be x
Then the number of grams of 22% will be 130-x
Thus, mathematically;
0.14(x) + 0.22(130-x) = 0.2(130)
0.14x + 28.6 - 0.22x = 26
0.22x - 0.14x = 28.6 - 26
0.08x = 2.6
x = 26/0.08
x = 32.5
Can someone solve or explain to me how to do this?
Answer:
a) x=5
b) x=6
Step-by-step explanation:
a)
3x+7=180-(10x-22)
3x+7=202-10x
13x=195
x=5
b)
11x-3=4x+39
7x=42
x=6
I am so sorry I forgot what the formula names are but these are the correct solutions. It has been a while since I've done Geometry.
Find the length of the diagonal of a square with perimeter 56
Answer:
About 19.8
Step-by-step explanation:
First find the side lengths. In this example, 56/4=14
Next use the Pythagorean theorem, to us it, here's the formula a squared plus b squared equals c squared. For this example use 14 squared plus 14 squared which equals 392.
Finally take the square root of 392 because we still need to take the squared out in c. The square root of 392 rounded to the nearest tenth is 19.8.
What is 36 x 36
A. 1296
B. 1256
C. 1298
D. 1301
Answer:
A.1296
Step-by-step explanation:
Answer:
A. 1296
Step-by-step explanation:
36 x 36 = 1296
I put it into a calculator..
Find the slope of the line. (-3/2, -3/2) (3/2, 3/2)
Answer:
1
Step-by-step explanation:
1st way: We can find the slope of the line by plugging the two points into the slope formula. If you do, slope would be (-3/2-3/2)/(-3/2-3/2) which simplifies to -3/-3 which is 1. The slope is 1.
2nd way: You can just use logic to figure it out because since the x and y in both of the points are equal to each other, we know that the slope has to be 1.
Answer:
It is 1. You would put one in the positive section of the line graph, and put 1 in the negative section of the line graph. ≥ × ≤`
Step-by-step explanation:
≥ × ≤`
13. What is the cube root of 217 to the nearest
integer?
A. 6
B. 15
C. 72
D. 109
86
Math Aca
Answer:
A
Step-by-step explanation:
Answer:
The answer is
A.6
Review later
17. In the translation below. True or false;
AB||A'B'
B
tion
5
10
A
1
15
20
A
T. True
Answer: true
Step-by-step explanation: I checked it
Mario got a part time job mowing lawns. On Monday he charged his neighbor $25 to mow his lawn, then spent $6 to refill his lawn mower with gas. The next day he mowed his Grandparents yard for $20. How much money does Mario have after mowing both yards?
Answer:
$39Step-by-step explanation:
Step one:
He charged $25 and spent $6 on gas on Monday.
then he made 25-6= $19 mowing his neighbor's lawn.
the next day is Tuesday(we are not told he spent any amount on gas on Tuesday).
So he mowed his Grandparents yard for $20.
total money saved for Monday and Tuesday is
19+20= $39
Hence he has $39 for mowing both yards
I ONLY HAVE 5 MIN TO TURN THIS IN PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Perform the operation below
(3x^2-10x+4)+(10x^2-5x+8)
Answer:
132−15+12
Step-by-step explanation:
Answer:
13x² - 15x + 12Step-by-step explanation:
(3x^2-10x+4)+(10x^2-5x+8)
= 3x² - 10x + 4 + 10x² - 5x + 8
= 3x² + 10x² - 10x - 5x + 4 + 8
= 13x² - 15x + 12will give brainliest!
which one is it. plz help
Answer:
A.
Step-by-step explanation:
Answer:
The answer is the first option.
Step-by-step explanation:
find the slope of the line that passes through 4,3 and 2,7
Answer: -2
Step-by-step explanation:
PLEASE HELP IVE BEEN WORKING SO LONG ON THIS
Answer:
Part A The 4th bubble y= -55x+1630
Part B 1630
Part C 55
Step-by-step explanation:
Part A Use slope to find answer. In this example, points (1,599) and (4,1430).
Next use equation y1-y2/x1-x2. In this example, 1599-1430/1-4 which equals 169/-3 and that equals -56.3333333333333333333333. Since y= -55x+1630 is closer, choose that answer.
Part B use y intercept. The y intercept is 1630
Part C Use the slope -55. It decreases by 55.
He ran 10 meters in 2.7 seconds. Priya ran 10 meters in 2.4 seconds. who ran faster?
Answer:
Priya
Step-by-step explanation:
Will mark brainliest!! Please answer ASAP
Will give extra points!!!
Please let me know if the picture above answer is correct or not and tell me the right answer!
Second question-
Which linear equation can be used to represent a line parallel to the x axis that passes through the point (8,5)
1) y=5
2) y=x+8
3) y=x+5
Answer:
y=5
Step-by-step explanation:
y= 5 is always parallel to x axis
HELPPPPPP
Question 8 of 10
If a country wants to decrease its national debt as quickly as possible, what
kind of budget will it most likely create?
O A. One that increases taxes and increases spending
B. One that decreases taxes and decreases spending
Ο Ο Ο
C. One that decreases taxes and increases spending
D. One that increases taxes and decreases spending
SUBMIT
Solve the equation 4x-6= 34. Write a reason for each numbered step.
Answer:
Steps:
4x - 6 = 34
Add 6 to both sides
4x - 6 + 6 = 34 + 6
Simplify:
4x = 40
Divide both sides by 4
4x/4 = 40/4
Simplify:
x = 10
Please answer correctly !!!!!!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!
Answer:
a = 155 degrees
Step-by-step explanation:
A straight line is equal to 180 degrees.
25 + a = 180
Subtract 25 from both sides.
a = 155
I hope this was helpful to you! If it was, please consider rating, pressing thanks, and marking my answer Brainliest. It would help a lot. Have a great day!
HELP ASAP PLS AMD THANK YOU
Anybody know this I’ll give you 25 points and the answer is not D
Answer:
Most likely D, not sure if I am correct, this might not help
Step-by-step explanation:
In order to find the inverse of an equation, we first swap x and y. Then, we solve for y in the new equation.
[tex]y=x^2-5\\x=y^2-5\\x+5=y^2\\±\sqrt{x+5} =y[/tex]
Ignore the A with a caret above it in the front, I don't know why it is there. I am not sure if I am correct, as I have only just completed Algebra 1 so I do not have good knowledge on mathematics.
I need help!!! Find m<2.
Answer:
Step-by-step explanation:
m∠2 = 180° - 113° = 67°
Find the two pairs of numbers whose LCM is the product of the numbers
help pls
Answer:
3 and 5
7 and 2
4 and 3
Step-by-step explanation:
3×5=15 and its LCM is also 15
7×2=14 and its LCM is also 14
4×3=12 and its LCM is also 12
find the unit rate. $46.54 for 5 hours
please answer and explain :)
Answer:
er
Step-by-step explanation:
i have a photo can someone solve it
Answer:
B
Step-by-step explanation:
The league raised $1,560 through fundraisers. Trenton estimates the cost of buying jackets for each player in the league. He concludes that the league has raised enough money. Do you agree with Trenton? Explain.
Answer:
Step-by-step explanation:
Estimates are rough guesses based on current or previous prices. Therefore, it is impossible to conclude whether or not Trenton has actually raised enough money, especially if no actual price for the jackets has been provided. That being said an estimation is usually a close enough representation of the actual value, which would mean that the chances of having raised enough money (if that is what the estimates say) are pretty high.
Please answer 3 question I will mark as brainlest
Answer:
The mode is 7
Step-by-step explanation:
Answer:
Sometimes people feel the need to post answers without work. I am greatly saddened by this, or just post answers for the points.
Step-by-step explanation:
I'm going to help, however!
Ok, the mode is the number that appears the most in the data set.
Let's organize this chaos, first. (I hated stats in middle school and elementary.)
6,7,8,9,10,6,7,10,7,6,7,9,7,6
Its best to organize it before finding it!
6,6,6,6,7,7,7,7,7,8,9,9,10,10.
Sevens are most numerous in this data set, with 5 7's!
There's your mode.
Hope this helps!
What is the difference of 85.23 and 2.675?
Answer: 82.555
Step-by-step explanation: I used a calculator
Kellie is allowed to watch up to 90 minutes of tv pre day. If she watched 10 minutes before school, how many 20-minute tv episodes can she watch after school?
Answer:
4
Step-by-step explanation:
As she watches 90 minutes of tv pre day and she watched 10 minutes before school
So minutes left 90-10=80
And 1 episodes contains 20 minutes
So she can watch tv episodes
= 80÷20
=4 (ans)
Note:It is the answer as far as I know. If you have any doubt you can go with others
During the big storm, 29 in. of snow fell in 8 hours. Find the rate of snowfall in inches per hour.
Answer:
3 5/8 inches of snow per hour
Step-by-step explanation:
29 divided by 8 = 3.625
(3 5/8)
if 29 inches for 8 hours, and you need to find how much snow in one hour, you can get 1 hour from 8 hours by doing 8 divided by 8. You use the same number to find the snow, divide 29 by 8 and you get the rate at which snow builds up.
Hope this wasn’t too confusing ^0^
Please help me answer this question
Answer:
x = 90 degrees and y = 43 degrees
Step-by-step explanation:
We have an isosceles triangle here, since the length of AB equals the length of AC.
That also means that angle ABC equals angle ACD = 47 degrees.
The sum of the interior angles of a triangle equals 180.
47 + 47 + 2y = 180
94 + 2y = 180
2y = 86
y = 43 degrees
x + 43 + 47 = 180
x + 90 = 180
x = 90
Enter a value that is a solution the equation(x + 7^2)=169
[tex]\huge\text{Hey there!}[/tex]
[tex]\mathsf{(x + 7^2) = 169}[/tex]
[tex]\mathsf{x + 7^2 = 169}[/tex]
[tex]\mathsf{x + 7\times 7 = 169}[/tex]
[tex]\mathsf{x + 49 = 169}[/tex]
[tex]\text{Subtract 49 to both sides}\downarrow[/tex]
[tex]\mathsf{x + 49 - 49 = 169 - 49}[/tex]
[tex]\text{Simplify it}\downarrow[/tex]
[tex]\mathsf{x = 169 - 49}[/tex]
[tex]\mathsf{x = 120}[/tex]
[tex]\large\text{Therefore, your answer should be:}[/tex]
[tex]\huge\boxed{\mathsf x = \frak{120}}\huge\checkmark[/tex]
[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
Slope is -1/2 and (-3,2) is on the line
