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avanturin [10]
3 years ago
8

Can someone please help me???

Mathematics
1 answer:
Ket [755]3 years ago
5 0
A)<x=105°. its easy!!!!!
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PLEASE HELP ME !ASAP!!
podryga [215]

Solution :

First term, a₀ = -10 .

Common difference of A.P. , d = -8 - (-10) = 2 .

Last term, aₙ = 24 .

We know, last term is given by :

aₙ = a₀ + (n-1)d

24 = -10 + (n-1)×2

2n - 2 = 34

n = 18

Now, sum of series is given by :

S_n = \dfrac{n}{2} \times ( 2a+(n-1)d)\\\\S_n = \dfrac{18}{2} \times ( 2\times -10 + ( 18 -1) \times 2)\\\\S_n =  126

Hence, this is the required solution.

7 0
3 years ago
1.x(x+4)=5
nlexa [21]

x (x + 4) = 5

x² + 4x = 5

x²+ x + (-5) = 0

(x+3)²+(t+3)²=9

x² + 6x + 9 + t² + 6t + 9 = 9

x² + t² + 6x + 6t + 18 + (-9) = 0

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x² + t² + 6(x + t) + 9 = 0

3/x + 4/2x = x - 1

6/2x + 4/2x = x - 1

10/2x = x - 1

10 = (x - 1) 2x

10 = 2x² - 2x

0 = 2x² + (-2x) + (-10)

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3 years ago
A train traveled 504 miles in 8 hours. A bus traveled 531 miles in 9 hours. Which mode of transportation has the faster rate?
OlgaM077 [116]
The train because it travels at 63 mph while the bus is 59 mph
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Please help it's do today!!
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Step-by-step explanation:

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