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siniylev [52]
3 years ago
7

3x + 2y = A 5x + y = B Eliminating the variable y from the system of equations results in -7x =

Mathematics
1 answer:
zhuklara [117]3 years ago
5 0
The answer is A
You would multiply the second equation by -2 to clear the 'y'.
This leaves -10x = 2B and 3x = A
When combining these we get -7x = A - 2B
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A line passes through (2, −1) and (4, 5). Which answer is the equation of the line?
k0ka [10]

Answer: y=3x-7 is the correct answer

Step-by-step explanation:

6 0
2 years ago
If m<BAD=102° and m<CAD=27°, what is m<BAC?
marissa [1.9K]
Angle BAC is 75 because you subtract 27 from 102.
6 0
3 years ago
Rajni bought 2 1/2 kg onion at ₹ 30 1/2 per kg. Find the amount spent by Rajni​
tia_tia [17]

Step-by-step explanation:

Given that

The cost of 1 kg onions = Rs. 30 1/2

The cost of 1 kg onions = Rs. 61/2

If Rajini bought 2 1/2 kg onions then

The total cost of 2 1/2 kg onions

→ 2 1/2 ×( 61/2)

→ (5/2)×(61/2)

→ (5×61)/(2×2)

→305/4

Rs. 305/4 or Rs. 76 1/4

The cost of 2 1/2 kg onions is Rs. 76 1/4.

5 0
2 years ago
Good morning!
den301095 [7]

Answer:

  • C. 0.75 in

Step-by-step explanation:

<u>Given</u>

  • d = 5 in
  • V = 176.715 in³

<u>Find the height of cylinder:</u>

  • V = πr²h
  • π(5/2)²h = 176.715
  • h = 176.715/(6.25π)
  • h = 9 in

<u>Sickness of each cookie is:</u>

  • 9/12 = 0.75 in

Correct choice is C

7 0
3 years ago
14. Solve: (a) 2y - 1/2 = -1/3 (b) 6 + 5 (a - 1) = 30
Strike441 [17]

A)2y - 1/2 = -1/3

2y=-1/3+1/2

FIND THE LCM TO MAKE THE FRACTIONS LIKE FRACTIONS

LCM OF 3 AND 2 IS 6

-1/3*2=-2/6

1/2*3=3/6

-2/6+3/6=1/6

2y=1/6

y=1/6 ÷ 2

TAKING THE RECIPROCAL,

RECIPROCAL OF 2 IS 1/2

y=1/6*1/2

y=1/12

B) 6 + 5 (a - 1) = 30

6+(5)*(a)+(5)*(−1)=30(Distribute)

6+5a+−5=30

(5a)+(6+−5)=30(Combine Like Terms)

5a+1=30

5a=30-1

5a=29

a=29/5

15.sum of three consecutive integers=48

let the numbers be x ,x+1,x+2

x+x+1+x+2==48

3x+3=48

3x=48-3

3x=45

x=45/3

x=15

x+1=15+1=16

x+2=15+2=17

the numbers are 15,16,17

​​  

7 0
3 years ago
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