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3 years ago

Bailey earned $210 last month. She

Mathematics

1 answer:

liberstina [14]3 years ago

4 0

It was not financially responsible because she used the money on non-essential things.

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If 3x^2+3y^2=42 and xy =-15.Find the value (x-y)^2

Alexxandr [17]

Answer:

Step-by-step explanation:

Given, 3x^2 + 3y^2 = 42

=>3(x^2 + y^2) = 42 =>x^2 + y^2 = 42/3= 14

Thus,

= (x - y)^2

= x^2 + y^2 - 2xy

= (x^2 + y^2) - 2xy

= 14 - 2(-15)

= 14 + 30

= 44

4 0

2 years ago

Twice the difference between a number and 4 is twenty. Find the number.

kogti [31]

Answer:

D 14

Step-by-step explanation:

Let x be the number

2(x-4) = 20

Divide each side by 2

2/2(x-4) = 20/2

x-4 = 10

Add 4 to each side

x-4+4 = 10+4

x = 14

7 0

2 years ago

Read 2 more answers

2 things wrong with the questionnaire? And..

lbvjy [14]

Doesn't ask what kind of cd's and what age it was aimed at

3 0

3 years ago

Read 2 more answers

A local hamburger shop sold a combined total of hamburgers and cheeseburgers on Thursday. There were fewer cheeseburgers sold th

myrzilka [38]

Answer:

the number of hamburgers sold on Thursday were 325.

Step-by-step explanation:

The total number of hamburger and cheese burger is missing

i will replace it with any figure, you can replace it wit your given data and you will get the solution.

A local hamburger shop sold a combined total of 593 hamburgers and cheeseburgers on Thursday

There were 57 fewer cheeseburgers sold than hamburgers

How many hamburgers were sold on thursday

Let h be the number of hamburgers and c be the number of cheeseburgers.

Using this information we can set up two equation as:

$h+c=593\\c=h-57$

Now we need to solve these two equations to get the value of number of hamburgers. For that we use substitution method as shown below:

$h+h-57=593\\2h-57=593\\2h=650\\h=325$

Therefore, the number of hamburgers sold on Thursday were 325.

6 0

2 years ago

11. What is the name of Angle 7 and Angle 8?

Sever21 [200]

Answer:

to answer this you need picture

8 0

2 years ago