All categories

2 years ago

Solve the system: 3x+6y=51 y=40-5x Write down your solution here

2 answers:

7 0

X=7 y=5
You need to used the second equation and isolate either x or y. It’s your choice. Then, use that and substitute it in for the first equation. Then you will get an integer and substitute it back to the second equation.

Ierofanga [76]2 years ago

5 0

Answer:

x=7 y=5

Step-by-step explanation:

3x+6(40-5x)=51

3x+240-30x=51

-27x+240=51

-27x=-189

27x=189

x=7

y=40-5(7)

y=40-35

y=5

You might be interested in

Use the number line to determine the unknown addend in the given number sentence.

Gnesinka [82]

Answer:

Step-by-step explanation:

-4+(-5)=-9

-4=-9+5

-4=-4......correct

5 0

2 years ago

Read 2 more answers

What is the value of n in the equation 3n + 2(n + 2) = 9n + 12?

Alex777 [14]

3n+2n+4=9n+12
5n+4=9n+12
4-12=9n-5n
-8=4n
Divide both sides by 4
n=-2

6 0

2 years ago

Janae' is buying food for a party. She is buying a cheese tray for $4.50 and a few pounds of fruit for

bogdanovich [222]

Answer:

0.67

Step-by-step explanation:

5 0

2 years ago

A right triangle with vertices J(4, 0), K(0,0), and L(0,5) is rotated around the x-axis. To the nearest tenth of a unit, what is

statuscvo [17]

This is the concept of graphs and volume of the solid figures, given that the triangle J,K,L was rotated along the x-axis, the resultant figure was cone with with radius of 5 units and a height of 4 units;
The volume of a cone is given by;
V=πr^2(h/3)
r=5 units
h=4 units
V=π*5^2*(4/3)
V=104.72 units^3
the answer is B]

5 0

2 years ago

Mr. Larson is debating between investing $10,000 into an account that pays 4% interest compounded daily or 4.9% compounded weekl

AVprozaik [17]

9514 1404 393

Answer:

4.9% weekly

Step-by-step explanation:

The compound interest formula is ...

A = P(1 +r/n)^(nt)

where A is the account balance that results from investing P at rate r compounded n times per year for t years.

Filling in the values for the two scenarios, we find ...

A = 10,000(1 +0.04/365)^(365·3) ≈ 11,274.89

A = 10,000(1 +0.049/52)^(52·3) = 11,582.74

The higher interest rate will earn Mr. Larson the most money in three years. (4.9% weekly)

5 0

2 years ago