All categories

2 years ago

X-y=3 X+2y=-6 Solve using substitution

Mathematics

1 answer:

Tresset [83]2 years ago

3 0

X-y=3=>x=3+y
X+2y=-6
=========
3+y+2y=-6
3+3y=-6
3y=-6-3
3y=-9
y=-3

X+2y=-6
X+2(-3)=-6
X-6=-6
X=0

You might be interested in

11. Find the value of x. (6x + 7) (8x - 17)

Leto [7]

Answer:

X= -7/6, 17/8

Step-by-step explanation:

Foil it, then use quadratic to find zeros/roots.

6 0

2 years ago

Can some help me with this

myrzilka [38]

Answer:

x = 5

Step-by-step explanation:

4x = 1x + 15

subtract 1x from both sides

3x = 15

divide 3 from both sides

x = 5

3 0

2 years ago

Read 2 more answers

Pls do with the working

saveliy_v [14]

Answer:

2) 70,000

Step-by-step explanation:

since they have said estimate meaning frist round off

679 rounds up to 700 and 98 rounds up to 100

700×100

70000

4 0

2 years ago

What is the sum of 2.5 × 104 and 3.4 × 104?

Lelu [443]

Answer:

613.6

Step-by-step explanation:

6 0

2 years ago

A point on the unit circle lie on the terminal side of an angle in standard position quadrant IV.

abruzzese [7]

Answer:

The cosine of the angle is positive

The sine of the angle is negative

Step-by-step explanation:

We are given that

angle lies in fourth quadrant

and we know that

In first quadrant:

sin is positive

cos is positive

In second quadrant:

sin is positive

cos is negative

In third quadrant:

sin is negative

cos is negative

in fourth quadrant , cosine of angle is always positive

and sine of angle is always negative

so,

The cosine of the angle is positive

The sine of the angle is negative

8 0

3 years ago

Read 2 more answers