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shusha [124]
3 years ago
5

PLEASE HELP ASAP 25 PTS + BRAINLIEST FOR RIGHT/BEST ANSWER

Mathematics
1 answer:
sergejj [24]3 years ago
6 0

8y = 4x -16

-x = -2y -4


Multiply all terms in the second equation by -1:

-x = -2y -4 x -1 = x = 2y +4


Now replace x in the first equation with this.


8y = 4(2y+4)


Simplify:

8y = 8y +16



Because there is an 8y on both sides of the equation, it cannot be solved.


The answer is no solution.

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Simplify the expression by combining like terms.<br><br> 16+8−3+6−9<br><br><br><br> Pls help
KiRa [710]

Answer:

5a + 6b + 7

step-by-step explanation:

16 + 8a -3a + 6a -9: subtract 9 from 16

7 + 8a -3a + 6b Now subtract -3a from 8a

5a + 6b + 7 is the final answer.

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1 year ago
Y=x^2+12x+30 8x-y=10
NARA [144]
Y=x^2+12x+30
8x-y=10
sub x^2+12x+30 for y in the secodn equaiton

8x-(x^2+12x+30)=10
8x-x^2-12x-30=10
-x^2-4x-30=10
times -1
x^2+4x+30=-10
add 10 both sides
x^2+4x+40=0
use quadratic formula
we find that we have 2 imaginary roots and therefor are not on the real plane, they are not plotted on the imaginary plane

no real solution
x=-2+6i or -2-6i
the interseciton on the imaginary plane is
(-2+6i, -26+48i) or (-2-6i,-26-48i)
5 0
3 years ago
Read 2 more answers
Angle C is 60 degrees and angle CAB is 78 we need to find angle DAB
ioda

Answer:

∠ DAB = 48°

Step-by-step explanation:

The sum of the 3 angles in Δ ACD = 180° , then

∠ CAD + 60° + 90° = 180° , that is

∠ CAD + 150° = 180° ( subtract 150° from both sides )

∠ CAD = 30°

Then

∠ DAB + ∠ CAD = ∠ CAB

∠ DAB + 30° = 78° ( subtract 30° from both sides )

∠ DAB = 48°

5 0
3 years ago
Sophia spent $27.16 on four sandwiches. If each sandwich cost the same amount, how much does one sandwich cost?
HACTEHA [7]

Answer:

6.79

Step-by-step explanation:

you just divide 27.16 (the cost) by 4 (how many sandwiches were purchased)

5 0
3 years ago
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