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3 years ago

Solve for x: 20 = 3x -1

Mathematics

2 answers:

Feliz [49]3 years ago

7 0

20=3x-1

move -1 to the other side

sign changes from -1 to +1

20+1=3x-1+1

20+1=3x

21=3x

divide both sides by 3 to get x by itself

21/3=3/3x

Cross out 3 and 3, divide by 3 and then becomes 1*1*x=x

21/3=x

Answer:

x=7

Stells [14]3 years ago

3 0

Answer:

Let’s solve your equation step-by step.

20=3x-1

Step 1:flip the equation.

3x-1=20

Step 2:Add 1 to both sides.

3x-1+1=20+1

3x=21

Step 3:divide both sides by 3.

3x/3=21/3

X=7

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Solnce55 [7]

ANSWER

$y = - 2x - 5$

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2 years ago

Determine 6th term in the geometric sequence whose first term is 3 and whose common ratio is -4.

GREYUIT [131]

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3 years ago

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Natasha_Volkova [10]

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8 0

2 years ago

Read 2 more answers

3. Let sin 21 = 0.358. What is the value of x for cos x=0.358?

r-ruslan [8.4K]

Answer:

$\cos(69)$

Step-by-step explanation:

We will use the co-function identity for sine, where:

$\sin(x)=\cos(90-x)$

Since sin(21)=0.358=cos(x). This means that:

$21=90-x$

Solve for x. Add x to both sides:

$x+21=90$

Subtract 21 from both sides:

$x=69\textdegree$

Hence:

$\sin(21)=\cos(69)\approx0.358$

6 0

2 years ago