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3 years ago

I need the answer please for a and b

Mathematics

1 answer:

zzz [600]3 years ago

7 0

Step-by-step explanation:

2x + x+4+x = 180

4x = 176

x = 44

A 88

B 48

C 44

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Evaluate the expression when y=-3 y^2-7y+6

Kaylis [27]

Answer:

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Step-by-step explanation:

Step 1: Define

y² - 7y + 6

y = -3

Step 2: Evaluate

Substitute in y: (-3)² - 7(-3) + 6
Exponent: 9 - 7(-3) + 6
Multiply: 9 + 21 + 6
Add: 30 + 6
Add: 36

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3 years ago

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Kazeer [188]

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3 years ago

Find the common ratio of the geometric sequence:

bonufazy [111]

Answer:

Step-by-step explanation:

multiply all numbers by 18

1,6,36,216,1296,7776

6×1=36

6×6=36

6×36=216

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6×n=...............

8 0

3 years ago

N=4; 2i and 3i are zeros f(-1)=50

Nonamiya [84]

Solution:- $\text{Let f(x) be any nth degree polynomial with n=4}\\$

$\text{Given that 2i and 3i are the zeroes of f(x)}$

$\text{so (x-2i) and (x-3i) are factors of f(x)}$

$\text{Since 2i is a zero of f(x) then its conjugate -2i is also a zero of f(x)}$

$\Rightarrow(x+2i) \text{is a factor}\\\text{Similarly, conjugate of 3i is -3i is also a zero of f(x) }\\\Rightarrow(x+3i)\text{is a factor}\\\text{So , }\\f(x)=k(x-2i)(x+2i)(x-3i)(x+3i)\\=k(x^2-(2i)^2)(x^2-(3i)^2)\\=k(x^2-4i^2)(x^2-9i^2)\\=k(x^2+4)(x^2+9)\\=k(x^4+13x^2+36)\\\text{As given}\\f(-1)=50\\\Rightarrow k((-1)^4+13(-1)^2+36)=50\\\Rightarrow k(1+13+36)=50\\\Rightarrow k(50)=50\\\Rightarrow k=1\\\text{So by substituting k=1 in f(x) we get ,}\\f(x)=(x^4+13x^2+36)$

6 0

3 years ago

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cricket20 [7]

Answer:

Step-by-step explanation:

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2 years ago