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andreyandreev [35.5K]

3 years ago

7

2+2=x a.3 b.9 c,5 d.4

1 answer:

zavuch27 [327]3 years ago

7 0

Answer:

D. 4

Step-by-step explanation:

2 + 2 = 4

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What is the value of x? <br><br> º

horsena [70]

y=180-109=71

In a triangle, the sum of angles is 180.

So, x=180-71-44=65

x=65

6 0

3 years ago

Guys please help me out ASAP, Due today. I

Mice21 [21]

Answer:

$T_7 = 11$

$T_n = 2n- 3$

Step-by-step explanation:

Given

$S_n = n^2 -2n$

$T_n = S_n - S_{n-1}$

Solving (a): T7

Substitute 7 for n in $T_n = S_n - S_{n-1}$

$T_7 = S_7 - S_{7-1}$

$T_7 = S_7 - S_6$

Calculate S7 and S6

$S_n = n^2 -2n$

$S_7 = 7^2 - 2 * 7 = 35$

$S_6 = 6^2 - 2 * 6 = 24$

So:

$T_7 = 35 -24$

$T_7 = 11$

Solving (b): Tn

$T_n = S_n - S_{n-1}$

Where $S_n = n^2 -2n$

Calculate $S_{n-1}$

We have:

$S_{n-1} =(n-1)^2 - 2(n-1)$

Open brackets

$S_{n-1} = n^2 -2n + 1 -2n +2$

$S_{n-1} = n^2 -2n-2n + 1 +2$

$S_{n-1} = n^2 -4n + 3$

So:

$T_n = S_n - S_{n-1}$

$T_n = n^2 - 2n - (n^2 -4n + 3)$

$T_n = n^2 - 2n - n^2 +4n - 3$

Collect Like Terms

$T_n = n^2 - n^2- 2n +4n - 3$

$T_n = 2n- 3$

5 0

3 years ago

Factorize the following quadratic equation u²- 12 u + 35 = 0

lubasha [3.4K]

Answer:

X₁=7 ,X₂ = 5

Step-by-step explanation:

a= 1² b= - 12 c= 35

X =[ ( -b±√b²-4ac ) / 2a]

So, use this formula and get the answer...

Even if you use the middle term formula, you will get the same answer

4 0

3 years ago

PLEASE ANSWER NOW

Brums [2.3K]

Answer:

15 scores are less than 90

Step-by-step explanation:

Total 11 scores are less than 90 not 15

3 0

2 years ago

Y=4, -4y + 5 evaluate it please

Shtirlitz [24]

Answer:

Step-by-step explanation:

=

4

−

4

+

5

=

9

−

4

8 0

3 years ago