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larisa86 [58]
3 years ago
13

Help! See the question below!

Mathematics
2 answers:
n200080 [17]3 years ago
5 0
It’s the 3rd problem:)
sweet-ann [11.9K]3 years ago
3 0
The 3rd answer would be correct !
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Find the sum of the first 10 terms 40, 37, 34, 31
Bezzdna [24]
<h3><u>Solution </u><u>:</u><u>-</u></h3>

Firstly finding common difference of the series

As we know that

• Common difference ( d ) = t₂ - t₁

→ Common difference = 37 - 40

→ Common difference = - 3

Now, as we know that

• Sn ( Sum of n terms ) = n/2 [ 2a + ( n - 1 ) d ]

Substituting n = 1. Since the sum of no. of terms is 10 . And substituting a = 40 ,since first term is 40

=> S₁₀ = 10/2 [ 2(40) + ( 10 - 1 ) -3 ]

=> S₁₀ = 5 [ 80 - 27 ]

=> S₁₀ = 5 × 53

=> S₁₀ = 265

Hence , sum of first 10 terms ( S₁₀ ) = 265

4 0
2 years ago
Our friend purchased a medium pizza for $10.31 with a 30% off coupon. What is the price of a medium pizza without a coupon? Do n
Komok [63]

Answer:

the price of a medium pizza without a coupon is 14.73

Step-by-step explanation:

The computation of the price of a medium pizza without a coupon is given below:

Given that

The Price of medium pizza be 10.31 after considering the 30% off coupon

That means it is 70% value

So the 100% value would be

= 10.31 × 1 ÷ 0.70

= 14.73

hence, the price of a medium pizza without a coupon is 14.73

3 0
2 years ago
Evaluate the following expressions given the functions below:<br> t(x) = -4(x + 12)<br> Let: t(a)
lara31 [8.8K]

Answer: t(a)= -4a - 48

Step-by-step explanation:

Just plug a into x so you'll get: t(a)= -4(a + 12)

Then simplify it: t(a)= -4a - 48

If it says let t(2) then you will plug 2 into x=> t(2)= -4(2 +12)

which equals to t(2)= -8 -48

t(2)= -56

Hope this help

6 0
2 years ago
The figures are similar. Find x.<br> Brainiest to the correct person!
STatiana [176]

Answer:

x=15

Step-by-step explanation:

since 6  is 3/4 of 8 and the figures are similar x must be 3/4 of 20

3/4 of 20 is 15

good day to you

5 0
2 years ago
Read 2 more answers
What is the inverse of f(x)=2x-6
saveliy_v [14]

Answer:

The inverse is 1/2x +3

Step-by-step explanation:

f(x) = 2x-6

y = 2x-6

Exchange x and y

x =2y-6

Solve for y

x+6 =2y

Divide by 2

1/2x +3 = y

The inverse is 1/2x +3

7 0
3 years ago
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