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3 years ago

Solve by Elimination:11. 3x - 3y - 2 = 6 & 4x - 5y - 3 = 4

Mathematics

1 answer:

rosijanka [135]3 years ago

8 0

Answer:

x = 6.33, y = 3.67 to the nearest hundredth.

Step-by-step explanation:

3x - 3y - 2 = 6

4x - 5y - 3 = 4 Simplifying these 2 equations:

3x - 3y = 8 (A) Multiply by by 5

4x - 5y = 7 (B) Multiply by by -3

15x - 15y = 40

-12x + 15y = -21 Adding:

3x = 19

x = 19/3 = 6.33

so y = (8 - 3 *6.33 ) / - 3 (from Equation B )

= 3.67.

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The diameter of the base of the cone measures 8 units.

weeeeeb [17]

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3 years ago

Read 2 more answers

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iVinArrow [24]

Answer:

7/10

Step-by-step explanation:

(2/5)%(-4/7)

We will change the second fraction to make multiplication

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3 years ago

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lana66690 [7]

Answer:

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3 years ago

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Find two numbers, if … b Their sum is −7 and their difference is 14

Delicious77 [7]

Answer:

x=0

y=-21/7

Step-by-step explanation:

Let the two unknown be x and y

x+y=-7...(1)

x-y=14...(2)

From (1) make x the subject of formula

x=-7-y...(3)

Substitute (3) into (2)

-7-y-y=14

-7-2y=14

Add 7 to both sides

-2y=21

Add both sides by-2

y=-21/2

Substitute the value of y into (3)

x=-7-(-21/2)

x=-7+21/3

Lcm

x=-21+21/3

x=0/3

x=0

4 0

4 years ago

Solve by Elimination:11. 3x - 3y - 2 = 6 & 4x - 5y - 3 = 4​

Solve by Elimination:11. 3x - 3y - 2 = 6 & 4x - 5y - 3 = 4