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dangina [55]
2 years ago
8

What is the value of y in the solution to the system of equations?

Mathematics
2 answers:
Molodets [167]2 years ago
6 0

Answer: y=32/5

Step-by-step explanation:

icang [17]2 years ago
3 0

Answer:

\frac{32}{5}.

Step-by-step explanation:

We have been given a system of equations and we are asked to find the value of y in the solution to the given system.

x+y=1...(1)

2x-3y=-30...(2)

To solve our given system of equation, we will use substitution method. From equation (1) we will get,

x=1-y

Upon substituting this value in equation (2), we will get:

2(1-y)-3y=-30

Using distributive property, we will get:

2-2y-3y=-30

2-5y=-30

2-2-5y=-30-2

-5y=-32

Now, we will divide both sides of our equation by -5.

\frac{-5y}{-5}=\frac{-32}{-5}

y=\frac{32}{5}

Therefore, the value of y is \frac{32}{5}.

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Lisa uses her hair dryer daily dryer uses 1500 watts. it take 10 mintes to dry her hair each time she uses it. how much would it
Volgvan

Answer:

Step-by-step explanation:

The answer is $11.55 for the week.

1) Since 1 watt is 0.001 kilowatts, 1500 watts is 1.5 kilowatts.

2) Multiply that by 7 for the week and that equals 10.5.

3) It takes her 10 minutes each day, so it takes 70 minutes per week, that is also 1.1 hours.

4) Multiply 10.5 kilowatts by 1.1 hours and you get 11.55.

5) The answer is $11.55 per week to dry Lisa's hair.

3 0
2 years ago
Eric has $25 to purchase magazines and to pay for his lunch. Each
faust18 [17]

Answer:

B

Step-by-step explanation:

The maximum amount Eric can spend on magazines is $25 less the cost of lunch, $15.

The appropriate inequality sign would be less than since he cannot spend more than $25.

Also, the amount he can spend on magazines would be what is left after paying for lunch.

So the correct inequality is 4m - 15 < 25

8 0
2 years ago
Pls help me solve this question, also include step by step calculation ya. Thks
sp2606 [1]

\displaystyle\\Answer:\ x=\sqrt{2}\ \ \ \ \ x=-\sqrt{2}\ \ \ \ \ x=\frac{ln5}{2}

Step-by-step explanation:

5x^2-x^2e^{2x}+2e^{2x}=10

Let:\ x^2=t  \ \ \ \ \ e^{2x}=v\\Hence,\\5t-tv+2v^2=10\\5t-tv+2v^2-10=10-10\\5t-tv-10+2v^2=0\\t(5-v)-2(5-v)=0\\(5-v)(t-2)=0\\5-v=0\\5-v+v=0+v\\5=v\\5=e^{2x}

<em>Prologarithmize both parts of the equation:</em>

ln5=lne^{2x}\\ln5=2x*lne\\ln5=2x*1\\ln5=2x\\

<u><em> Divide both parts of the equation by 2:</em></u>

\displaystyle\\x=\frac{ln5}{2}

t-2=0\\t-2+2=0+2\\t=2\\x^2=2\\x=\sqrt{2} \\x=-\sqrt{2}

6 0
1 year ago
For which real numbers x and y is it true that x + y = x+y?
Alchen [17]
By the general application of cumulative property of addition :

x + y = y + x

For sure
6 0
3 years ago
I need help with this one
Aleksandr [31]

Answer:

58 degrees

Step-by-step explanation:

The little square in the corner signals a right angle/a 90 degree angle. If x and 32 add up to 90, then x is 58.

7 0
2 years ago
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