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Soloha48 [4]
3 years ago
10

Solve the equation below for y. 8x+4y=20

Mathematics
2 answers:
stira [4]3 years ago
8 0
4y=20-8x
Y=20-8x/4
Y=5-2x
tia_tia [17]3 years ago
4 0
The final answer is Y= -2x + 5

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A town has a population of 5000 and grows at 4% every year. What will be the population after 7 years, to the nearest whole numb
dimulka [17.4K]

Answer: The population would be 6580 after 7 years.

Step-by-step explanation:

The growth rate is exponential. We would apply the formula for exponential growth which is expressed as

y = b(1 + r)^ t

Where

y represents the population after t years.

t represents the number of years.

b represents the initial population.

r represents rate of growth.

From the information given,

b = 5000

r = 4% = 4/100 = 0.04

t = 7 years

Therefore

y = 5000(1 + 0.04)^7

y = 5000(1.04)^7

y = 6580

8 0
3 years ago
In the lab, Eric has two solutions that contain alcohol and is mixing them with each other. He uses 3 times as much Solution A a
Oduvanchick [21]

Answer:

Solution A = 2100

Solution B = 700

Step-by-step explanation:

Given that:

Let :

Millimeter of solution A = a

Millimeter of solution B = b

% alcohol, solution A =. 20% = 0.2

% alcohol solution B, = 14% = 0.14

Resulting millimeter of. Alcohol = 518

a = 3b - - - (1)

0.2a + 0.14b = 518 - - - - (2)

Put a = 3b in (2)

0.2(3b) + 0.14b = 518

0.6b + 0.14b = 518

0.74b = 518

b = 518 / 0.74

b = 700

a = 3b

a = 3(700)

a = 2100

5 0
3 years ago
Maria is coloring in triangles,squares and circles using 3 colors red blue and yellow or Maria only uses a color on each shape o
padilas [110]

Answer:

The number of possible color combinations that she can make = 6

Step-by-step explanation:

The number of available colors = 3

The question states that Maria only uses a color on each shape at a time,

The number of possible color combinations that she can make = 3!

n! = n*(n -1)*(n-2)*......*1

3! = 3 * 2 * 1

3! = 6 combinations

The number of possible color combinations that she can make = 6

3 0
3 years ago
4a - 5 = 11<br> Solve this please
d1i1m1o1n [39]

Answer:

a = 4

Step-by-step explanation:

Given equation:

4a - 5 = 11

Add 5 to both sides:

⇒ 4a - 5 + 5 = 11 + 5

⇒ 4a = 16

Divide both sides by 4:

⇒ 4a ÷ 4 = 16 ÷ 4

⇒ a = 4

7 0
2 years ago
Read 2 more answers
In the circle below, chord AB passes through the center of circle 0. If the radius OC is perpendicular to chord AB and has lengt
Airida [17]

Answer:

Option (C)

Step-by-step explanation:

In the given circle, AB is a chord passing through the center O.

Therefore,chord AB is a diameter of the circle and OC is the radius.

AO = OB = OC

OC⊥AB, and length of OC = 7 cm

By applying Pythagoras theorem in right ΔBOC,

BC² = OC² + OB²

BC = \sqrt{OC^{2}+OB^{2}}

     = \sqrt{7^2+7^2}

     = 7\sqrt{2}

     ≈ 9.9 units

Therefore, Option (C) will be the answer.  

7 0
3 years ago
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