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Mashcka [7]
3 years ago
9

Is (8, 3) a solution to the system? - x + 4y = 4 - x + 3y = 1

Mathematics
1 answer:
Kaylis [27]3 years ago
8 0

Answer:

Step-by-step explanation:

You can either substitute (8, 3) into both equations as a test, or you can find the solution yourself.

Rewrite

- x + 4y = 4

- x + 3y = 1

as

- x + 4y = 4

+ x - 3y = -1

and combine like terms.  The result is y = 3.  Then -x + 4(3) = 4, or 8 = x.

Yes, (8, 3) is a solution of this SYSTEM.

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x=time
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5 0
3 years ago
Who can prove that ? :D<br><br> prove that lim x about 0 (sin(x)/x)=1<br> by using sandwich theorem
earnstyle [38]
cos (x)  \leq \frac{sin (x)}{x}  \leq 1

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8 0
3 years ago
A cone has a volume of 942 in.³ and a height of 9 inches what is the radius of the cone use 3.14 for pie
bija089 [108]

Answer:

r = 51.96 inches

Step-by-step explanation:

V_{cone} = \pi {r}^{2} h  \\  \\  \implies \: r^{2}  =  \frac{V_{cone}}{\pi h } \\  \\  \implies \:  r^{2} =  \frac{942}{3.14 {(9) } }\\  \\  \implies \:  r^{2} =  \frac{942}{3.14 {(9) } } \\  \\  \implies \:  r^{2} =2700 \\  \\  \implies \:  r= \sqrt{2700}  \\  \\  \implies \:  r=51.96 \: inches

8 0
2 years ago
Solve <br> 7x + 6 &lt; -22 need help asap!
VLD [36.1K]

Answer:

x<−4

Step-by-step explanation:

7x+6<-22

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Hope it helped!

4 0
3 years ago
Read 2 more answers
Bethany has $3.10 in nickels and dimes. She has a total of 44 coins. What is the value of the nickels Bethany has?
lesantik [10]
0.05n + 0.1d = 3.10
n + d = 44

d = 44 - n

Substituting to the first equation:

0.05n + 0.1(44 - n) = 3.10
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-0.05n = 3.10 - 4.4
n = 26

Obtaining the value of nickels:
26 * 0.05 = 1.3

Therefore, the value of nickels that Bethany has is $1.30
8 0
3 years ago
Read 2 more answers
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