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4 years ago

Explain how this works and the answer please

Mathematics

1 answer:

lys-0071 [83]4 years ago

6 0

Answer:

Step-by-step explanation:

If y=6 and z=3, then plug in the numbers given to the variables.

3/2 times 6, -3 + 5/3 times 3.

6= 6/1, so, you can do the same operation.

3/2 times 6/1. then subtract 3 from that.( you have to simplify them to make equal denominators)

5/3 times 3/1 then add that to your previous answer.

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Vinil7 [7]

I think the answer you’re looking for is
Point Y
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6 0

3 years ago

Read 2 more answers

3) x2+ y2 - x + 3y - 42 = 0<br> X+y=4

REY [17]

The solution is $(-1,5)$ and $(7,-3)$

Step-by-step explanation:

The expression is $x^{2} +y^{2} -x+3y-42=0$ and $x+y=4$

Using substitution method we can solve the expression.

Let us substitute $x=4-y$ in $x^{2} +y^{2} -x+3y-42=0$

$(4-y)^{2} +y^{2} -(4-y)+3y-42=0$

Expanding and simplifying the expression, we get,

$\begin{array}{r}{16-8 y+y^{2}+y^{2}-4+y+3 y-42=0} \\{2 y^{2}-4 y-30=0}\end{array}$

Let us use the quadratic equation formula to solve this equation,

$\begin{aligned}y &=\frac{4 \pm \sqrt{16-4(2)(-30)}}{2(2)} \\&=\frac{4 \pm \sqrt{16+240}}{4} \\&=\frac{4 \pm 16}{4} \\y &=1 \pm 4\end{aligned}$

Thus, $y=5$ and $y=-3$

Substituting y-values in the equation $x+y=4$ , we get the value of x.

For $y=5$ ⇒ $x=4-5=-1$

For $y=-3$ ⇒ $x=4+3=7$

Thus, the solution set is $(-1,5)$ and $(7,-3)$

7 0

4 years ago

Many bank accounts never go below zero. But some banks will allow a negative balance, at least for a short time, called an overd

Sergio039 [100]

Answer:

the amount after 3 weeks is $37.33

Step-by-step explanation:

Given that

His balance is -$48.82 i.e. overdraft

Now in order to get the positive balance, he plans to deposit the money of $28.55 per week

We need to find out the amount after 3 weeks

So,

= -$48.32 + $28.55 + $28.55 + $28.55

= $37.33

hence, the amount after 3 weeks is $37.33

3 0

3 years ago

2. How many solutions does the system have?

Shtirlitz [24]

Answer:

I think it is b or d I'm not sure though

4 0

3 years ago

What are some types of quadrilaterals

ankoles [38]

Quadrilaterals include all regular 4 sides shapes.
Such as, square, rectangle, trapezoid, and parallelogram

I hope this helped!

3 0

4 years ago