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3 years ago

-3t + 9 greater than or equal to-21

Mathematics

2 answers:

gladu [14]3 years ago

7 0

Answer: t<=10

Step-by-step explanation:

-3t+9>=-21

-3t>=-30

3t<=30

t<=10

nordsb [41]3 years ago

6 0

Answer

t = -4

Step-by-step explanation:

First you subtract 9 from both sides. You get 12 on the right. Then you divide both sides by -3. You get -4.

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Read 2 more answers

14 times a number decreased By eight is 22 Increase by 20 times The same number

kotegsom [21]

Answer:

14x - 8 = 22 + 20x

x = -5

Step-by-step explanation:

Let "the number" be represented by x

Take each part of the statement and translate into algebraic form

"14 times a number" 14x

"decreased By eight" -8

"is" =

"22 Increased by" 22 +

"20 times The same number" 20x

Put the equation together. Solve for x by isolating.

(

14x - 8 = 22 + 20x

14x - 8 - 20x = 22 + 20x - 20x Subtract 20x from both sides

-6x - 8 = 22

-6x - 8 + 8 = 22 + 8 Add 8 to both sides

-6x = 30

-6x ÷ -6 = 30 ÷ -6 Divide both sides by -6

x = -5

4 0

3 years ago

How to graph 14x+18y=126

Burka [1]

We need to rearrange this into $y=my+c$
Subtract 14x from both sides
$18y=-14x+126$
Divide both sides by 2
$9y=-7x+63$
Divide both sides by 9
$y=\frac{-7x+63}{9}=\frac{-7x}{9} +\frac{63}{9}$
Plot the point (0, 63/9)
Then pick some x values and put them into the equation to find the respective y values
Then plot those points
Finally join up those points