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Gre4nikov [31]
2 years ago
5

Helpppppp I’m begging

Mathematics
1 answer:
SVEN [57.7K]2 years ago
7 0

Answer:

put formula of parallelogram

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Solve the system of linear equations and show your work.<br> −8x+5y=26<br> 9x−3y=−3
maks197457 [2]
X is 7 and y is 2 I am pretty sure
6 0
3 years ago
Find the solution of the system of equations.<br> 10x+10y=40 <br> 5x+3y=8
ddd [48]

Answer:

x = -2 & y = 6

Step-by-step explanation:

10x+10y=40

10x+10y+ -10y=40+-10y

10x=-10y+40

\frac{10x}{10} =\frac{-10y+40}{10}

x=-y+4

5x+3y=8

5(-y+4)+3y=8

-2y+20=8

-2y+20+-20=8+-20

-2y=-12

\div2

y=6

x=-y+4

x=-6+4

x=-2

Hope this helps.

7 0
2 years ago
Review the steps of the proof of the identity
koban [17]

Answer:

step 2

and then also in step 3 compensating the error in step 2

Step-by-step explanation:

I think I just answered this for another post.

sin(a - b) = sin(a)cos(b) - cos(a)sin(b)

so, step 1 is correct :

sin(A - 3pi/2) = sin(A)cos(3pi/2) - cos(A)sin(3pi/2)

but step 2 suddenly and incorrectly switched that central "-" to a "+".

yes, sin(3pi/2) = -1, but that is still an explicit factor in step 2. so it was not used to flip the central operation from subtraction to addition, and therefore this change was a mistake.

then, in step 3, another error was made by just ignoring the "-" sign of "-1" and still keeping the central "+" operation. this error compensated for the error in step 2 bringing us back by pure chance to the right result.

5 0
1 year ago
500 increased by 30%
fgiga [73]

500 + 30% equals 650. 30% of 500 equals 150.

4 0
2 years ago
Please answer quick I need to get this for my mock test​
Ulleksa [173]
I think 64.29 bc 90 percent of 500 is 450 so i did 450 percent of 700
5 0
3 years ago
Read 2 more answers
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