4x + 9y = 29 x = 5y - 87

1 answer:

8 0

What I would do here is substitute "5y -87" for x in the first ecquation, since the second equation is already in the form "x=..." so:

4*(5y-87)+9y=29

getting rid of the bracket:

20y-348+9y=29

adding up:

29y=29+348

29y= 377

dividing by 29:

y=13

and now we can calculate x, which is 5*13-87=65-87=-22

so x=-22

You might be interested in

PLSSS HELP ME ASAPPPPPPP

Greeley [361]

THE ANSWER IS B $115 plz mark me brainliest i want points :’)

8 0

3 years ago

Read 2 more answers

Help me please. I don't understand this.

navik [9.2K]

9514 1404 393

Answer:

see attached

Step-by-step explanation:

Apparently, you're being asked to identify the sequence of steps you would use to compute the volume of the pyramid.

It seems to be a good idea to start with the formula for the volume.

Then, recognize that you need to compute B, so make that computation. The area of the base (B) is the product of the base dimensions (14)(12).

Once you have the value of B, then you can put that, along with the value of h, into the original volume formula.

Evaluating it gives the volume in cubic units.

_____

<em>Additional comment</em>

If you're familiar with the pyramid volume formula, you know that you must compute B before you can make use of the formula. That makes the sequence be B=14(12); B=168; V=1/3Bh; V=1/3(168)(7).

However, if you're starting from scratch, it is probably good to begin with the volume formula. That is what tells you that you need to find B in the first place. This is the sequence we show below.

6 0

3 years ago

Which correlation coefficient represents a moderate negative correlation? r = –0.04 r = –0.24 r = –0.64 r = –0.94

fomenos

The correlation coefficient is a number that indicates the direction

and closeness of points of a line of best of fit.

So it tells us two things.

It tells us the direction of the line of best fit

and it tells us the closeness of the points.

Usually, anything between -0.9 and -0.6 has a moderate negative correlation. If you look at this on a graph, you will notice that the points definitely resemble a line so we say it's moderate.

It will be a negative correlation because the slope is negative.

5 0

3 years ago

Read 2 more answers

The ratio of the measures of the three angles in a triangle is 9:3:6.

Alex

Step-by-step explanation:

this is how you solve it :)