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s344n2d4d5 [400]
2 years ago
12

Solve the system by substitution  y=-382 y = 6x + 3 

Mathematics
1 answer:
nikdorinn [45]2 years ago
6 0

okay so i assume you meant these two:

y=-382 and y=6x+3

Answer:

y=-382

x=-385/6

Step By Step:

y=−382;y=6x+3

Step: Solve y=−382 for y:

y=−382

Step: Substitute −382 for y in y=6x+3:

y=6x+3

−382=6x+3

−382+−6x=6x+3+−6x (Add -6x to both sides)

−6x−382=3

−6x−382+382=3+382 (Add 382 to both sides)

−6x=385

Divide both sides by -6.

x=-385/6

y=-382

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A bag contains 55 coins of $1 and ¢50 denominations. Find the number of coins of each denomination, if the total amount in the b
DerKrebs [107]

Answer:

Number of $1 coins are 25 and number of 50 cent coins are 30.

Step-by-step explanation:

Let's set up the equations.

Let there are x number of $1 coins

There are y number of 50 cent coins

So, x+y =55

1 x+0.50 y =40

Solve the equations for x and y.

Solve the first equation for y.

y=55-x

Substitute y as 55-x into the second equation.

1 x+0.50(55-x)=40

Solve the equation for 'x'.

Distribute the 0.50 to get rid the ( ).

1 x+27.5-0.50 x= 40

Combine like terms

0.50 x +27.5=40

Subtract both sides 27.5

0.50 x =12.5

Divide both sides by 0.50

x=25

Now, plug in x as 25

y=55-25

y=30

So, number of $1 coins are 25 and number of 50 cent coins are 30.

3 0
2 years ago
Is (x + 5) a factor of f(x) = x3 − 4x2 + 3x + 7? Use either the remainder theorem or the factor theorem to explain your reasonin
garik1379 [7]

Answer:

No

Step-by-step explanation:

3x-8+3x+7-(simplified)-> 6x-1, which does not have (x+5) as a factor

4 0
2 years ago
Read 2 more answers
Question 4 please:<br> Witch numbers in the box are multiple of 3
umka21 [38]

Answer:

6 AND 12

Step-by-step explanation:

3 x 2 = 6

3 x 4 = 12

4 0
3 years ago
Read 2 more answers
What is the General form of this equation?<br> (x- -1)^2 +(y-1)^2 =225.0
KATRIN_1 [288]
General Form is the most basic form of an equation and is used as a template to form equations designed to solve a specific problem.

The equation given is "<span>(x- -1)^2 +(y-1)^2 =225.0".

The general form of this Equation would be presented as 

</span>·X (+/-) Y = Z
·X^2 (+/-) Y^2 = R1
<span>
-I hope this is the answer you are looking for, feel free to post your questions here on brainly in the future.</span>
4 0
3 years ago
Please help on question 17 with step by step instructions <br> Thanks in advance xx
shutvik [7]
Let x = Initial Price

If we increase x by 5%, we are adding 0.05x

Therefore, the new price = x + 0.05x = 1.05x

If the ticket has increased by £2.30, £2.30 is 5% of the initial price, or 0.05x

0.05x = 2.30

x = 2.30/0.05

x = 46

Therefore, the price of the ticket before the increase was £46

You can also check this backwards by doing 46*0.05 = 2.30
6 0
3 years ago
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