All categories

3 years ago

5a - 24b =-15 10a + 45c =21 48b + 35c = 49

Mathematics

1 answer:

andrew-mc [135]3 years ago

6 0

5a + 15 = 24b so,

10a + 30 = 48b,

sub to third equation,

10a + 30 + 35c = 49

10a + 35c = 19

perform elimination with second equation

10a + 45c = 21

10a + 35c = 19

________________-

10c = 2

c = 1/5

sub to second equation,

10a + (45)(1/5) = 21

10a + 9 = 21

10a = 12

a = 6/5

sub to first equation

(5)(6/5) - 24b = -15

6 + 15 = 24b

21 = 24b

b = 7/8

redo the calculations, correct me if I'm wrong

You might be interested in

in a bag of keys there are 15 silver keys six black keys 11 copper keys and two painted keys of various colors. one key is drawn

Setler79 [48]

Answer:

The best thing to do here is to put each of these into fractions, with the total (31) as the denominator.

14/31= silver

6/31= black

8/31= copper

3/31= various colours.

As you're looking for the keys that are silver or copper, you've got to add the two denominators together, which gives you 14+8= 22.

This cannot be simplified further, therefore, the probability of choosing either a silver or copper key is 22/31.

Hope this answer helps you :)

Have a great day

Mark brainliest

7 0

3 years ago

Describe a diagram of a pair of triangles that share a common angle and a common side.

Delicious77 [7]

Answer:

uploaded in the attachment

Step-by-step explanation:

if u see the diagram, there are 2 triangles in it ABC and ABD.

the common side for these pair of triangles is AB.

common angle is angle BAC.
therefore, these triangles share a common side AB and a common angle BAC.

7 0

3 years ago

Is y = -x + 5 non-linear or linear

Lubov Fominskaja [6]

Answer:

It's linear

Step-by-step explanation:

Linear equations have no exponents higher than a 1, which is the case for this equation cause if there's no exponent it's cause it's just a 1. Non-linear has a exponent higher than a 1, ex. $x^{2}$

3 0

3 years ago

I just need all the numbers on top in feet on the graph please

sattari [20]

Answer:

2.5, 5, 7.5

Step-by-step explanation:

Count.

3 0

3 years ago

What quadrants is csc less than 0.

adelina 88 [10]

quadrant IV

Sure hope this helped you, have a good day! =)

6 0

3 years ago