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Musya8 [376]
2 years ago
12

(–2) + (–20) step by step

Mathematics
2 answers:
vazorg [7]2 years ago
7 0

Answer:

-22

Step-by-step explanation:

Step 1: Subtract 20 from -2

  • (-2) + (-20) is the same thing as -2 - 20
  • When subtracting a negative value from a negative number, you keep the negative sign and just add the two numbers.
  • - 2 - 20 = -22

Therefore, the answer is -22.

aalyn [17]2 years ago
6 0
(-2) +(-20) =-22
2+20=22 make result negative
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Can someone explain what geometric sequences are?
Fed [463]

Explanation:

A sequence is a list of numbers.

A <em>geometric</em> sequence is a list of numbers such that the ratio of each number to the one before it is the same. The common ratio can be any non-zero value.

<u>Examples</u>

  • 1, 2, 4, 8, ... common ratio is 2
  • 27, 9, 3, 1, ... common ratio is 1/3
  • 6, -24, 96, -384, ... common ratio is -4

___

<u>General Term</u>

Terms of a sequence are numbered starting with 1. We sometimes use the symbol a(n) or an to refer to the n-th term. The general term of a geometric sequence, a(n), can be described by the formula ...

  a(n) = a(1)×r^(n-1) . . . . . n-th term of a geometric sequence

where a(1) is the first term, and r is the common ratio. The above example sequences have the formulas ...

  • a(n) = 2^(n -1)
  • a(n) = 27×(1/3)^(n -1)
  • a(n) = 6×(-4)^(n -1)

You can see that these formulas are exponential in nature.

__

<u>Sum of Terms</u>

Another useful formula for geometric sequences is the formula for the sum of n terms.

  S(n) = a(1)×(r^n -1)/(r -1) . . . . . sum of n terms of a geometric sequence

When |r| < 1, the sum converges as n approaches infinity. The infinite sum is ...

  S = a(1)/(1-r)

8 0
3 years ago
HURRY PLEASE!! I’ll mark you as brainliest!!<br><br> Solve the system: 3x + y = 10 and -4x - 2y = 2
BaLLatris [955]

Answer:

uld you like to ask?

10th

Maths

Pair of Linear Equations in Two Variables

Algebraic Solution of a Pair of Linear Equations

Solve: 3x + 4y = 10,2x - 2y...

MATHS

Asked on December 27, 2019 byShweta Rudravaram

Solve: 3x+4y=10,2x−2y=2 by the method of elimination.

EASY

Share

Study later

ANSWER

3x+4y=10 …………..(1)

2x−2y=2 (or) x−y=1 …………(2)

(1) ⇒(3x+4y=10)1

(2) ⇒(x−y=1)3

                     _____________________

                                3x+4y=10

                                3x−3y=3

                      _____________________

                                    7y=7

∴y=1

Put y=1 in (1) we get 3x+4×1=10

3x=10−4=6

∴x=36=2

Hence x=2,y=1.

7 0
3 years ago
I don’t know how to answer my this math question, it’s easy so please help
Fofino [41]

which one ?

the bottom or the top or is this a trick

7 0
3 years ago
Is 18 and 0.3 equivalent
grigory [225]

Answer:

No

Step-by-step explanation:

Because 0.3 is a decimal and 18 is a whole number.

0.3 = 3/10 which is 30%

5 0
3 years ago
Which expression is equivalent to<br> 5<br> 8
neonofarm [45]

Answer:

10/16

Step-by-step explanation:

Just multiply the denominator and the numerator by 2 and wha la you get 10/16 hope it helps!

4 0
2 years ago
Read 2 more answers
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