3 years ago

Y-4x=3. 2x-3y=21 can someone help

Mathematics

1 answer:

mars1129 [50]3 years ago

3 0

Y-4X =3 ; 2x-3y=21

Y= 3+ 4x

2x -3( 3+4x)= 21

2x- 9- 12x= 21

-10x -9= 21

-10x -9+9= 21+9

-10x = 30

X= 30/-10= -3

Y= 3+4x = 3+ 4* (-3)= 3-12= -9

You might be interested in

16. Your scores on four algebra tests are 93, 69, 89, and 97: After the

sdas [7]

Answer:

81 and above

Step-by-step explanation:

They have to be 81 and above

93+69+89+97=348

348/4=87 (average)

87=81=168

168/2= 84 (average)

4 0

3 years ago

Read 2 more answers

work out the area of a circle with diameter 1.8cm take pie to be 3.142 and give your answer to 1 decimal place.

Masja [62]

Area of a circle = Pi x r^2
Area = Pi x 3.24
Area = 10.18...
Area = 10.2 cm

6 0

3 years ago

If A=60 and B=60, then find the value of tanA(A+B) = tanA + tanA/1- tanA .tanB

mihalych1998 [28]

Answer:

your answer is 160

Step-by-step explanation:

just add 60+60_160 u might have to add because its tanned

6 0

3 years ago

What is -3/5 as a decimal?????

Leona [35]

Answer:

-0.6

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Ericka is also in Mr. Whittaker’s science class and she recorded the variation in water level at a different part of the river.

Anton [14]

Answer:

first one is 2.2mm/year and second is 6.2years and -2.2mm/year

Step-by-step explanation:

Just trust me im right

3 0

3 years ago