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8_murik_8 [283]
3 years ago
13

Solve 3x − 5y = 17 9x − 15y = −4

Mathematics
1 answer:
Umnica [9.8K]3 years ago
6 0
This is a system of equations, which means that we can solve it using either the elimination method or the substitution method. I will show elimination:
9x - 15y = 51
9x - 15y = -4
The top equation is found by multiplying the first equation by 3.
If you subtract the equations, you will find that it says 0 = 55. This is incorrect, so this system of equations has no solutions.
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Can someone answer number nine for me
sweet [91]
Ground level is 0

who is closer to ground level...
-20 7/9 = - 20.77 (with a line over the 7 because it is repeating)
-20 39/50 = -20.78

so, closer to ground level is the black garden ant at -20 7/9 ft because this is closer to 0 then -20 39/50 ft.

5 0
4 years ago
Equation is equivalent to 4.5 = 2a?
nasty-shy [4]
<span>Simplifying 4.5 = 2a

Solving 4.5 = 2a
Solving for variable 'a'.
</span>
<span>Move all terms containing a to the left, all other terms to the right.
 Add '-2a' to each side of the equation. 4.5 + -2a = 2a + -2a
</span>
<span>Combine like terms: 2a + -2a = 0 4.5 + -2a = 0
</span>
<span>Add '-4.5' to each side of the equation.
4.5 + -4.5 + -2a = 0 + -4.5
</span>
<span>Combine like terms: 4.5 + -4.5 = 0.0
0.0 + -2a = 0 + -4.5
-2a = 0 + -4.5
</span>
<span>Combine like terms: 0 + -4.5 = -4.5
-2a = -4.5
Divide each side by '-2'.
a = 2.25
 Simplifying
a = 2.25

Let's check: 2 x 2.25 = 4.5
Next time, follow these steps and you will pass


Hope I helped :)
</span>
7 0
4 years ago
Find the measure of the missing angle using the triangle angle sum theorm.
3241004551 [841]
A triangle is always 180 degrees so if we add 127+20 we’d get 147. 180-147 is 33 degrees. the missing angle is 33
8 0
3 years ago
I need this help me please
Airida [17]

Answer:

 I think its B

Step-by-step explanation:

7 0
3 years ago
Will mark brainliest
emmasim [6.3K]
Since line t is a transversal line all angle which are perpendicular with 63 will equal to the same value (63) and also line m is a straight line where it’s total will be 180

So,
3x + 2x + 63 = 180
5x + 63 = 180
5x = 180 - 63
5x = 117
Divide by 5 throughout
X = 23.4degrees
4 0
2 years ago
Read 2 more answers
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