How many mg of a metal containing 62 percent nickel must be combined with 4 mg of pure nickel to form an alloy containing 78 percent nickel? Which of the following equations could be used to solve this?
Answers
Answer:
3.29 milligrams of a metal containing 62 percent nickel must be combined with 4 mg of pure nickel to form an alloy containing 78 percent nickel.
Step-by-step explanation:
To determine how many mg of a metal containing 62 percent nickel must be combined with 4 mg of pure nickel to form an alloy containing 78 percent nickel, the following calculations must be performed:
50 + 0.62X = 78
0.62X = 78 - 50
0.62X = 28
X = 28 / 0.62
X = 45.16
100 - 45.16 = 54.84
54.84 = 4
45.16 = X
45.16 x 4 / 54.84 = X
180.64 / 54.84 = X
3.29 = X
Therefore, 3.29 milligrams of a metal containing 62 percent nickel must be combined with 4 mg of pure nickel to form an alloy containing 78 percent nickel.
Answer:
C
Step-by-step explanation:
a(0.62)+4(1.00)/a+4+78/100
Related Questions
21 is less than w+6 solve the inequality for w
Answers
Step-by-step explanation:
21<w+6
honestly I think im wrong because I didn't really get the question, sorry
Answer:
15 < w
Step-by-step explanation:
We are given the expression "21 is less than w + 6" and are asked to solve this inequality for "w".
To do so, we first need to create the actual inequality, if 21 is less than w + 6, then the sign we should use is the less than sign (<).
21 < w + 6
Now we solve for w, which is by isolating w :
21 < w + 6
Subtract 6 from both sides :
15 < w
Naomi asked several classmates how much cash they had in their pocket. She recorded the data below:
$1.50, $5, $9, $2, $0, $22, $4.75, $11.50, $4, $3, $7.50, $5, $0.75, $2.25, $8
a. Use the frequency table to make a histogram.
Answers
Answer:
the answer is $2,883$
Step-by-step explanation:
Help Me On One Of These Please!
Answers
2. 6 throws
3. 13 throws
Explanation: just counted the numbers under the leaf part hope i helped
please help I will appreciate it
Answers
Answer:
c. no solution
Step-by-step explanation:
i hope this helps :)
Answer:
c
Step-by-step explanation:
they are parallel so they won't intercept. therefore they won't have a solution
x ≥ -2 is the inequality of the graph below
True or False
Answers
Answer:
Kiara i left your life for a whole year due to my mom seeing that i was talking to you and that was the first strike. and then i came back and we got into an argument and i guess that was the last strike. but even though my mom forced me to leave, im terrified that your going to do the same to me.
Step-by-step explanation:
but im sorry for doing those annoying pranks on you, it was immature and mean, and it really wasn't worth it because now im in deep sorrow, missing you already.
just please can you forgive me Kiara?
PLEASE SHOW WORKK PLZZZZ HELLPPPP:))
Answers
b) = 9 boys
c) = 4 boys
Grades on a science test are shown in the box plot below.
Find the correct data that the box plot represents.
A) 78, 81, 89, 75, 76, 91, 100, 63, 80, 87, 91, 95
B) 55, 81, 89, 75, 76, 91, 100, 63, 80, 87, 91, 95
C) 78, 81, 45, 75, 76, 91, 100, 63, 80, 87, 91, 95
D) 78, 81, 89, 75, 76, 91, 100, 63, 80, 87, 91, 110
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Hope this helps!
which one is correct please help
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Can someone please help me with this question the instructions are to use a calculator to find the perimeter (the solid lines and curves) of each figure. The perimeter of each semicircle can be found by using the equation 1/2 pi d (the place where I put the words pi has the pi symbol, and d is just a variable. Also use 3.14 as pi, and the top part is cut off a little bit, but it still counts as a full semi circle. Please help me.
Answers
Answer:
34
Step-by-step explanation:
multiply n divide
In the figure, line m is parallel to line n. The measure of angle 2 is 40 degrees and the measure of angle 3 is 68 degrees. What is the measure of angle 5?
Explain how you found the answer using the relationships of angles.
Answers
Answer:
∠1 - 40°
Step-by-step explanation:
∠1 - 40°
b/c it's a right triangle and we have two angles given, 50° and 90°. Add them and subtract by 180° and get 40°.
∠2 - 140°
b/c an exterior (outside) angle is equal to the two most isolated / farthest angles added. The two most is angles are 105° and 35°, add them and get 140°.
∠3 - 40°
b/c ∠'s 1 and 3 are vertical angles meaning they're equal so since ∠1 is 40°, so is ∠3.
∠4 -
b/c ∠' s 2 and 4 are vertical angles meaning they're equal so since ∠2 is 140°, so is ∠4.
∠5 - 35°
b/c we have two angles, 105° and 40°. Add them and subtract by 180° and get 35°.
hope that helps lol >:)
Help me please It due in 19 minutes
Answers
^ is exponent btw
Jessica rented 1 video game and 3 movies for a total of $11.50.
• The video game cost $4.75 to rent.
• The movies cost the same amount each to rent.
What amount, in dollars, did Jessica pay to rent each movie?
Answers
6.75 divided by 3 which = $2.25
Felicity plans to go to community college for two years and then transfer to a four year college for two more years to complete her degree tution for one year at community college is about $4,730 tution for one year at a four year college is about $11,640 how much should she plan to pay for tution in all
Answers
At a football stadium, 25% of the fans in attendance were teenagers. If there were 190 teenagers at the football stadium, what was the total number of people at the stadium?
Answers
Please help! I need it now!
Answers
Answer:
1. triangular
2. triangles
3. rectangles
4. rectangular
5. rectangles
6. number of faces = 6
number of edges = 12
number of vertices = 8
7. number of faces = 5
number of edges = 9
number of vertices = 6
8. number of faces = 7
number of edges = 15
number of vertices = 10
9. triangular
10. triangles
11. square
12. square
13. triangles
14. number of faces = 6
number of edges = 10
number of vertices = 6
15. number of faces = 7
number of edges = 12
number of vertices = 7
16. cube
17. square pyramid
18. triangular pyramid
19. triangular prism
20. rectangular prism
The scale of a map in Florida is 1.25 inches = 100 miles. Orlando and Miami are 235 miles apart. How far apart are Orlando and Miami on the map? Round to the nearest hundredth
Answers
Answer:
2.94 inches
Step-by-step explanation:
235*1.25=293.75, 293.75/100=2.9375
rounded to the nearest hundredth is 2.94
The answr is 2.94 inches
2/6 - 7/20 as a proper fraction or mixed number
Answers
Answer:
2/6 - 7/20 is -1/60 in fraction form.
Answer: 2/6 − 7/20 = −1/60
Solution with Steps:
(2/6 ×10/10) − (7/20 × 3/3)
=
20/60 - 21/60
=
-1/60
can you help me plsssssss
Answers
Answer:
60.16
Step-by-step explanation:
Don't really know how to explain this other than use a calculator.
Hope that this helps!
A shipping manager weighed a random sample from a shipment of 90 boxes and made the dot plot below. What is the mode of the dot plot?
I need the answer asap.
Answers
What is the greatest measure of the given data?
Answers
Answer:
3
Step-by-step explanation:
i did the test
please helpppppppppppppppp :))))) and show your work
Answers
Answer: The answer is 165
Step-by-step explanation:
Those who will visit the garden more than 3 times in the next month will be those who visit 4, 5, and 6 or more times.
Out of the 75 surveyed, the total number of those are:
= 9 + 12 + 3
= 24
That would give a percentage of:
= 24 / 75
= 32%
This means that the best estimate for those who will visit more than 3 times is 32%.
Out of the total number of 516, that is:
= 32% * 516
= 165 members
hope you do well
HELP PWEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!!!!
A rectangular prism has a base with a length of 45 meters and a width of 11 meters. The height of the prism measures twice its width. What is true about the rectangular prism?
The height of the prism measures( )meters, so its volume is ( )cubic meters.
Answers
Answer:
The height of the prism measures 22 meters
The volume of the prism measures 10,890 cubic meters.
Step-by-step explanation:
The height is twice the width of the prism.
The prism's width is 11 meters.
2 x 11 = 22
The volume of a rectangular prism is calculated as:
V = l x w x h
So, the volume is:
V = 45 x 11 x 22
The volume is 10,890 cubic meters.
Hope this helps!
Answer:
Height = 22 Volume = 10890
Step-by-step explanation:
The width is 11 so multiply by 2 to get 22.
Then just do 45 x 11 x 22 which is 10890.
Mike is making a large pizza for dinner. He needs to cover the pizza with cheese. The pizza has a 28 inch diameter. How many square inches of cheese is needed to cover the whole pizza? Use 3.14 for Pi
Answers
There are 9,075 trees in Memorial Park. If there are 726 trees per acre, there are __ acres in the park.
Answers
Answer:
12 i think
Step-by-step explanation:
hope it helps
Answer:
12.5 acres
Step-by-step explanation:
Linda is training for a half marathon. She ran
3 3/4 miles Monday, 3 miles Tuesday, and 2 1/2
miles Wednesday. How many miles did she
run in those three days?
Answers
What is the surface area of this rectangular prism?
Answers
Answer:
the exact answer is 250m2
Step-by-step explplanation:
3*7=21
21*2=42
13*2=26
13*7= 91
91*2=182
182+26+42 = 250m3
QUESTION 4! help me
ASAP PLEASEEE
Answers
Answer:
It c
Step-by-step explanation:
The scatter plot shows the temperature in Celsius and the amount of rainfall in centimeters. Using the trend of the scatter plot, how much rain will fall at 40 degrees Celsius?
Answers
Answer:
is 6 degrees Celsius
Someone please help me?! (Theoretical Compound Probability)
Answers
8 out of 40
12 out of 20
3 out of 10
5 out of 20
which equation best represents the relationship between x and y in the graph