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3 years ago

Last question HELPPPPP!!!!!!

Mathematics

1 answer:

andriy [413]3 years ago

6 0

Divide

each side/length by the mean.

Step-by-step explanation:

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Please help! really needing help solve the problem

guapka [62]

Answer:

Step-by-step explanation:

By Basic proportionality theorem:

$\frac{10}{8} = \frac{3x - 6}{12} \\ \\ \frac{10 \times 12}{8} = 3x - 6 \\ \\ \frac{120}{8} = 3x - 6 \\ \\ 15 = 3x - 6 \\ 15 + 6 = 3x \\ 21 = 3x \\ \frac{21}{3} = x \\ 7 = x \\ \\ \huge \red { \boxed{x = 7}}$

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3 years ago

Solve for a: 2a + 8b = 4c

professor190 [17]

The answer is
a=2c-4b

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3 years ago

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What is the simplified answer to 5+3w+3-w

DaniilM [7]

Answer:

Step-by-step explanation:

$5+3w+3-w\qquad\text{combine like terms}\\\\=(3w-w)+(5+3)\\\\=2w+8$

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3 years ago

How would you solve cos(5x)=sin(10x) ?

Tomtit [17]

We will use double angle identities:
cos (5x ) = sin (10x )
cos (5x ) = 2 cos (5x ) sin ( 5x )
cos ( 5 x) - 2 cos ( 5 x ) sin ( 5x ) = 0
cos ( 5 x ) · [ 1 - 2 sin (5 x) ] = 0
cos ( 5 x ) = 0 or :   1 - 2 sin (5 x) = 0
5 x = π/2 +kπ, k∈Z sin (5 x) = 1/2
x1 = π/10 + kπ/5    5 x = π/6+2kπ , k∈ Z
5 x = 5π/6 +2kπ , k∈ Z
x 2 = π/30 +2kπ/5
x 3 = π/9 + 2kπ/5

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3 years ago

Exercise: Evaluate the expressions for a = 2 and b = 6<br> (a + b)2

Vesnalui [34]

Answer:

Step-by-step explanation:

Simply plug in 2 for a, then 6 for b and substitute

(2+6)2

Then do order of operations to simplify PEMDAS

First what's inside the parenthesis

(8)2

Then multiply

16.

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3 years ago

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