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otez555 [7]
3 years ago
13

What is the value of x + 3/4 when x=1/8

Mathematics
1 answer:
White raven [17]3 years ago
8 0

Answer: 7/8

Step-by-step explanation: This is a substitution problem, from the expression x + ³/₄, where x = ¹/₈, we now replace or substitute for x and then solve the expression fractionally, the expression now becomes

¹/₈ + ³/₄

Now , find the l. c. m. of the denominator 8 and 4

            1 + 6

        =  _____    

              8

          = 7/8

NOTE: To get 1 and 6, you find out how many times 8 can go in the l. c. m. and later multiplied the number of times by  the numerator which = 1.

And the number of times 4 can go in the l. c. m. (8) which is 2 times then multiplied by the numerator (3) = 6.

Adding 1 and 6 together gives 7/8.

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Need help with this one also please. Due in half hour. Greatly appreciate it
natka813 [3]

Answer:

  9 nickels

Step-by-step explanation:

Changing a quarter to a nickel decreases the value of the sum by $0.20.

When all quarters are changed to nickels and vice versa, the total value will change by the number of excess quarters. That number is ...

  ($5.95 -3.35)/(0.20) = 2.60/0.20 = 13

The remaining change is made up of equal numbers of nickels and quarters. That amount of change is ...

  $5.95 -13·0.25 = 2.70

A quarter and nickel together total $0.30, so there must be $2.70/$0.30 = 9 such pairs of coins.

There are 9 nickels and 22 quarters.

_____

If you don't want to reason through the problem, you can write equations. Let n and q represent the numbers of nickels and quarters, respectively. Then you have ...

  0.05n + 0.25q = 5.95

  0.25n + 0.05q = 3.35

Multiplying the second equation by 5 and subtracting the first gives ...

  5(0.25n +0.05q) -(0.05n +0.25q) = 5(3.35) -(5.95)

  1.20n = 10.80

  10.80/1.20 = n = 9

The number of nickels is 9.

8 0
3 years ago
What is the value of a if the line passes through (a,7) and (1,a) has a slope of -5/9
ASHA 777 [7]
Y=-5/9x + b
Substitute the points in the equation to give you two equations.
1. 7=-5a/9 + b
2. a= -5/9(1) + b
Then solve using either substitution or elimination.

6 0
4 years ago
Find measure of the radius of the circle
Naya [18.7K]

Answer:

For 7, r=4.1, and for 8, r = 8.7

Step-by-step explanation:

r is the distance from the center point to anywhere in the circle, meaning that (assuming C is the center point), You just take the length of the side from C to the other points in the circle.

8 0
4 years ago
You set your entertainment budget to $100 per month. eating out cost $35, movies cost $15, and concerts cost $60. can you eat ou
Scilla [17]
You can not eat out, go to a movie, and go to a concert in the same month because you would exceed your budget of $100 by $10.
6 0
3 years ago
Read 2 more answers
Is 5*9=4666666445554646444646
Step2247 [10]

Answer:

No, it is 45

Step-by-step explanation:

5*9=45

6 0
3 years ago
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