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Archy [21]
3 years ago
10

Solve the system by the substitution method X+y = -9 Y = -4x

Mathematics
1 answer:
MrMuchimi3 years ago
3 0

x-4x=-9

-3x=-9

x=-9÷-3

×=3

y=-4 (3)

y=-12

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(Need Help ASAP (Willing to give 10 points for 1 question)
True [87]

Answer:

a) -2 and 4

b) function 2

Step-by-step explanation:

a)

rate of change is rise over run: change in y / change in x.

function 1:

- i will use first 2 pairs of data

- change in y: 5 - 3 = 2

- change in x: -2 - (-1) = -1

-rate of change = 2/-1 = -2

function 2:

- same idea, but find two points on the graph!

- (0,4) and (-1,0) for example! pick easy points

- change in y is 4. chabge in x is 1

- rate of change is 4

b)

function b has greatest rate of change. 4 > -2

5 0
2 years ago
Multiply. Express your answer in standard form. (3−4i)(5+6i)
jeyben [28]

Answer:

Input:

(3 - 4 i) (5 + 6 i)

Result:

39 - 2 i

Polar coordinates:

r≈39.0512 (radius), θ≈-2.93567° (angle)

Position in the complex plane:

Position in the complex plane

Minimal polynomial:

x^2 - 78 x + 1525

ANSWER IS 39-2i

Step-by-step explanation:

4 0
3 years ago
Please Help <br> Problem solving
kodGreya [7K]
P  = $1,100
r = 7.25% = 0.0725

A= P(1+r)^t
⇒ 6600 = 1100(1+0.0725)^t
⇒ 6600/1100 = 1.0725^t
⇒ 1.0725^t = 6

Use log to solve it
log(1.0725^t) = log 6
⇒ t * log 1.0725 = log 6
⇒ t * 0.0303973 = 0.7781512
⇒ t = 0.7781512/0.0303973
⇒ t = 25.599 ≈ 25.60 years


8 0
4 years ago
Apple juice and cranberry juice have been mixed in the ratio 4:5. If the price of apple juice is 45 cents per pint and the price
Contact [7]
The ratio of apple and cranberry juice is 4:5
The price of 1 pint of apple juice is $0.45
The price of 1 pint of cranberry juice is $0.08
from the ratio given, the price amount of apple juice in the mixture will be:
4/5×0.45=$0.36
the price amount of cranberry juice in the mixture will be:
1/5×0.08=$0.016
the price of the mixture will be given by:
0.36+0.016
=$0.376

3 0
3 years ago
You set up a hot chocolate stand, your supplies is 75$ you charge 0.50 for each cup
Mumz [18]
0.50x=75
You will be able to sell 37.5 and if
You round it, it will be 38 cups of hot chocolate
4 0
3 years ago
Read 2 more answers
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