3 years ago

Plz help please and thank you

Mathematics

1 answer:

Ivanshal [37]3 years ago

4 0

Answer:

(5,-3)

Step-by-step explanation:

9x+2y=39

6x+13y=-9

---------------

117x+26y=507

12x+26y=-18

----------------------

105x=525

x=5

Substitution

9(5)+2y=39

45+2y=39

2y=-6

y=-3

You might be interested in

If the value of X is negative what equation still be true ?explain.

Brut [27]

Answer:

yes

Step-by-step explanation:

5 0

3 years ago

Fred earns dollars. Chad earns 45% more than Fred which expression represents the amount of money in dollars that chad earns

Genrish500 [490]

Answer:

$0.45x

Step-by-step explanation:

Fred earns dollars. Let Fred earns $x.

Chad earns 45% more than Fred.

We need to find the expression for Chad.

Chad amount = 45% of x

$=\dfrac{45}{100}x\\\\=0.45x$

So, Chad earns $0.45x.

7 0

3 years ago

The vertex from of the equation of a parabola is y = (x - 3)2 + 36 what is tge standard form of the equation

Misha Larkins [42]

Multiply it out and collect terms.
y = (x - 3)² + 36
y = (x² -6x +9) +36
y = x² -6x +45

6 0

3 years ago

Help pls so people say it’s none of these but idk I am confused.

crimeas [40]

Answer:

Volume = $\pi r^2 h$

2512 = 3.14 × r^2 × 8

$r^2 = \displaystyle\frac{314}{3.14}$

$r^2 = 100$

$r = 10 \ cm$

$Diameter = 2r = 20 \ cm$

Dont get confused try to understand : )

8 0

3 years ago

Read 2 more answers

Use the ratio table to solve the percent problem,

Masja [62]

Answer:

302.8

Step-by-step explanation:

If you ever have a calculator by your side remember that a percentage is just a decimal moved two digits to the left. So in this case, the equation is just 757•0.4. Sorry, however, I do not know what you're asking at the top part.

6 0

2 years ago