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3 years ago

A+3/4=7/8. Please help solve equation using subtraction

Mathematics

1 answer:

vazorg [7]3 years ago

7 0

1/8
If you can make the bottom numbers (denominator) The same that you can use subtract the top numbers like normally

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. At a high school basketball game, Hannah sold 400 tickets total. Adult tickets cost $5 and student

joja [24]

D. because of the students

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3 years ago

1. Find the function f (x) =ax2 + bx+ c whose graph contains the points (1, 2), (-2,-7), and (2, -3). Write the system of equati

IRISSAK [1]

Answer:

1. The function is -2x^2 + x + 3.

Step-by-step explanation:

1. The point at (1,2) gives the equation:

a * (1^2) + 1b + c = 2

a + b + c = 2

The point at (-2,-7) gives the equation:

a * (-2^2) + (-2b) + c = 7

4a - 2b + c = -7

The point at (2,-3) gives the equation:

a * (2^2) + 2b + c = -3

4a + 2b + c = -3

Hence, all three equations are:

a + b + c = 2

4a - 2b + c = -7

4a + 2b + c = -3

Now, subtract the second equation from the third equation to get:

(4a + 2b + c) - (4a - 2b + c) = -3 - (-7)

4a - 4a + 2b + 2b + c - c = -3 + 7

4b = 4

b = 1

Hence, let's now update our previous equations:

a + 1 + c = 2 => a + c = 1

4a - 2(1) + c = -7 => 4a + c = -5

4a + 2(1) + c = -3 => 4a + c = -5

This can be further whittled down into two equations:

a + c = 1

4a + c = -5

Hence, we can now subtract the first equation from the second to get:

(4a + c) - (a + c) = -5 - 1

4a - a + c - c = -6

3a = -6

a = -2

Therefore, c = 3 (a + c = 1, -2 + c = 1, c = 1 + 2, c = 3).

And the function is -2x^2 + x + 3.

Hope this helped!

4 0

3 years ago

I NEED HELP I NEED IT BAD PLZZZZZZZZZ

schepotkina [342]

Answer:

Step-by-step explanation:

Repeating decimals are rational numbers

HTH :)

6 0

3 years ago

What set of measures could be the lengths of three segments that form a triangle ?

12345 [234]

I dont see the sets !!

But i assume the quest and i try to answer it !! Just check the set in which the sum of any two sides are bigger than the other !!

As in triangle sum of any two sides must be greater than the third one !!

5 0

3 years ago

A store owner makes a special blend of coffee from Colombian Supreme costing $4.99/lb and Mocha Java costing $5.99/lb. The mixtu

STALIN [3.7K]

Answer:

The mixture contains 47 lb of Colombian Supreme and 3 lb of Mocha Java.

Step-by-step explanation:

We are given the following in the question:

Let x be the amount of Colombian supreme and y be the amount of Mocha java in the mixture.

Total amount of mixture = 50 lb

Thus, we can write the equation:

$x + y =50$

Total unit cost of mixture = $5.93/lb

Cost of Colombian Supreme = $4.99/lb

Cost of Mocha Java = $5.99/lb

Thus, we can write the equation:

$\dfrac{4.99x+5.99y}{50}=5.93\\\\4.99x+5.99y=296.5$

Solving the two equations by elimination method,

$4.99x+5.99y-4.99(x+y)=296.5-4.99(50)\\y=47\\x = 50-y=3$

Thus, the mixture contains 47 lb of Colombian Supreme and 3 lb of Mocha Java.

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3 years ago