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2 years ago

Find the value of y in the solution to the system of equations shown. 3y=18x+6 y=2x+14

Mathematics

1 answer:

ololo11 [35]2 years ago

5 0

Answer:

y=14

Step-by-step explanation:

because I solved it and got 14 ......

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Martha Washington walks 30 minutes each day. If she walks for 140 days, how many hours will she walk?

telo118 [61]

make 30 minutes into an hour then divide 140 by 2

140/2=70

70x1=70

5 0

2 years ago

What is the zero in the quadratic function f(x)= 9x^2-54x-19?

Alex17521 [72]

Answer:

6.33... and 0.333...

Step-by-step explanation:

The quadratic formula is

$x=\frac{-b+\sqrt{b^2-4ac} }{2a}$ .

It is important because while some quadratics are factorable and can be solved not all are. The formula will solve all quadratic equations and can also give both real and imaginary solutions. Using the formula will require less work than finding the factors if factorable. We will substitute a=9, b=-54 and c=-19.

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}\\x=\frac{-(-54)+/-\sqrt{(-54)^2-4(9)(-19)} }{2(9)}\\x=\frac{54+/-\sqrt{2916+684} }{18}$

We will now solve for the plus and the minus.

The plus,,,

$x=\frac{54+\sqrt{3600}}{18}\\x=\frac{54+60}{18}\\x=\frac{114}{18}\\x=6.3$

and the minus...

$x=\frac{54-\sqrt{3600}}{18}\\x=\frac{54-60}{18}\\x=\frac{-6}{18}\\x=-0.333...$

8 0

3 years ago

Naomi is a sales person. She sold a calculator for $86 and earned 20% commission. How much commission did Naomi earn?

Free_Kalibri [48]

Answer:

$17.20

Step-by-step explanation:

Total commission = cost x percent commission rate

86 x 20 % = 17.20

Total commission = $17.20

3 0

2 years ago

Please help me with this! I will rate you brainliest!!

lesya [120]

do 6x8.(theres two x's and two y's)

3 0

2 years ago

Read 2 more answers

Pierre stands on level ground at the point P, 5 metres from O.

GenaCL600 [577]

So hmm notice the picture below

thus $\bf \cfrac{4.24}{x}=\cfrac{2x+5}{2x}\implies 8.48x=2x^2+5x\implies 8.48x-5x=2x^2
\\\\\\
3.48x=2x^2\implies 0=2x^2-3.48x\implies 0=x(2x-3.48)
\\\\\\

\begin{cases}
0=x\\
----------\\
0=2x-3.48\\
3.48=2x\\\\
\cfrac{3.48}{2}=x\\\\
1.74=x
\end{cases}$

so, is clearly not 0, so it has to be 1.74

6 0

2 years ago