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myrzilka [38]
4 years ago
5

Solve using elimination. -7x – 5y = 5 -9x – 5y = 15

Mathematics
2 answers:
docker41 [41]4 years ago
7 0
Eliminate y's
multiply 2nd eqution by -1 and add to 2nd

-7x-5y=5
<u>9x+5y=-15 +</u>
2x+0y=-10

2x=-10
divide 2
x=-5
sub back

-9x-5y=15
-9(-5)-5y=15
45-5y=15
minus 45 bot sides
-5y=-30
divide both sides by -5
y=6

x=-5
y=6

(x,y)
(-5,6)
ozzi4 years ago
3 0
 -7x-5y=5
-(-9x-5y)=15   It's minus because negative times negative = positive
2x=-10
x= -5

-7(-5) - 5y = 5
35-5y =5
-5y = -30
y=6
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Whatnis the greatest common factor of 7 and 19
viktelen [127]
7 and 19 are both prime numbers.
 
Factors of 7
1 * 7 = 7
7 * 1 = 7
factors are 1 and 7

Factors of 19
1 * 19 = 19
19 * 1 = 19
factors are 1 and 19

GCF = greater common factor
So GCF is 1 because there is no greater common number in the 7 and 19
7 0
4 years ago
The graph below represents which of the following functions?
Katarina [22]

Answer: The function that represents the inequality of the given graph is;

Option A

Graph Inequalities

From the given graph, the curve with the shaded dot shows less than or equal to because the dot indicates that the maximum input value of x is at that point.

Secondly, the curve without a shaded dot shows that the input function of x is only greater than 3.

Looking at the options, option A is right and we will prove it thus;

for y = x³ - 3

At x = 2, we see that;

y = 2³ - 3

y = 5

This corresponds with the given equation

For the second curve, for y = x² + 6;

At x = 2, we have;

y = 2² + 6

y = 4 + 6

y = 10

This corresponds with what is given and is thus correct.

This, option A is the correct answer

Read more about graphed inequalities at; brainly.com/question/11234618

4 0
3 years ago
ANSWER FAST !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
vampirchik [111]

Answer:

If this is the way I was taught and how I took the question. 38/57 or 2/3

Step-by-step explanation:

19 * 2 = 38/

19* 3 = 57

38 ÷19 = 2/

57 ÷19 =3

so 2/3

6 0
3 years ago
28-3(2+4)+9 <br><br> With explanation
m_a_m_a [10]

Answer:

Go through PEMDAS

Step-by-step explanation:

<h2>28-3(2+4)+9</h2><h2>2+4=6</h2><h2>28-3(6)+9</h2><h2>6+9=15</h2><h2>28-3+15</h2><h2>28-3=25</h2><h2>25+15=40</h2>
7 0
3 years ago
Read 2 more answers
Wrote the equation of the line that passes through (3,4) and (2,-1) in slope intercept form
nordsb [41]
So the equation of a line is y=mx + b.

In order to find the slope given only two coordinates we have to use a formula to find slope. It is:
y2-y1/x2-x1.

So let’s get all the values first from (3,4) and (2,-1).

y2= -1
y1=4
x2=2
x1=3
Plug in the values now.
-1 - 4 = -5
-5/2-3=5

The slope is 5x.

Now let’s find the y intercept, to find the y intercept, we have to do a formula which is:
y-y1=m(x-x1)
So let’s plug in the values.
y-4=5(x-3)
y-4=5x-15
+4 +4
y=5x-11

The final answer is y=5x-11!!!

Can I get the brainliest answer or a heart? Thank you. If you need any further help, please message me on brainly or message me on Instagram
@jessmyybest
6 0
3 years ago
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