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3 years ago

That's the answer... I don't understand how you get -43a and -6

Mathematics

2 answers:

Roman55 [17]3 years ago

4 0

You want the explanation. Or answer?

kobusy [5.1K]3 years ago

4 0

Distribute 8a by 5a and because there's two a's its a squared then distribute 8a by -6 which gives you -48a then you distribute the positive 1 by 5a which gives you 5a then distribute it the positive 1 by -6 and then combine like terms

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True or false? A correct answer is worth (2 pts). Explain how you know for the additional (2 pts). Using complete sentence for (

PtichkaEL [24]

answer (in words)

FALSE. the coordinate pair (5, 2) is not a solution to the equation $2x+3y=10$ . in order to figure out whether or not the statement is true or false, plug the $x$ and $y$ values from the coordinate pair (5, 2) into the given equation, $2x+3y=10$ . if both sides of the equation end up equal, the coordinate pair is a solution to the equation. if not, the coordinate pair is not a solution to that equation.

(i hope i explained that well enough, i'm better at explaining it algebraically as opposed to putting it into words lol)

answer (algebraic/steps for solving)

first, plug in 5 for $x$ in the equation $2x+3y=10$ .

$2x+3y=10$ ⇒ $2(5)+3y=10$

then plug in 2 for $y$ .

$2(5)+3y=10$ ⇒ $2(5)+3(2)=10$

now your equation is $2(5)+3(2)=10$ . all that's left to do is to simplify. you can do this in whatever order you'd like, but i'll start with multiplying 2 · 5.

$2(5)+3(2)=10$ ⇒ $10 + 3(2) = 10$

multiply 3 · 2.

$10 + 3(2) = 10$ ⇒ $10 + 6 = 10$

add 10 + 6.

$10 + 6 = 10$ ⇒ $16=10$

16 and 10 are not equal, therefore (5, 2) is not a solution to the equation $2x+3y=10$ . in order for a coordinate pair to be the solution to an equation, both sides of the equation need to end up equal after solving and simplifying.

i hope this helps! have a great rest of your day <3

6 0

3 years ago

The size of a television is usually indicated by the length of the screens diagonal if a person buys a 20 inch television set th

ipn [44]

diagonal = sqrt(a^2 +b^2)

20 = sqrt(12^2 +b^2)

20= sqrt(144+b^2)

20^2 = 144 + b^2

400 = 144 + b^2

256 = b^2

b = sqrt(256) = 16

it is 16 inches wide

8 0

3 years ago

Help! I don’t understand

Luden [163]

Answer:

y=1/2x+2

Step-by-step explanation:

The equation of a line is y=mx+b where m is the slope and b is the y intercept.

First we find the slope. We can start by picking any point. Let's say (0,2). From this to get to the next point we have to rise 1 and go to the right two. This gives us a slope of 1/2 (slope=rise/run). Now that we have the slope, we can find the y-intercept. This is where the line intercepts the y axis. Therefore x would be 0. The point (0,2) is where the line intercepts the y axis, so the y intercept is 2.

Now that we have the slope and the intercept we can right the equation.

y=1/2x+2

7 0

2 years ago

The box plots show the average gas mileage, in miles per gallon, of the cars sold at a dealership in June and in December.

Montano1993 [528]

Answer:

The correct answer is B The interquartile range for cars is about 7 mpg, and the interquartile range for minivans is about 3 mpg.

Step-by-step explanation: it makes sence and if youre using edge it is correct :)

5 0

4 years ago

Read 2 more answers

Find the retail price of this pair of shoes. Original cost: $250; Markdown 18%

Luden [163]

Hey You!

18 / 100 * 250 = 45

The retail price of the shoes is $45.

8 0

3 years ago