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4 years ago

Equation please help me solve 1:4 = 3:x

Mathematics

1 answer:

Aliun [14]4 years ago

7 0

The answer is X = 12 because 3 is 1x3 so 4x3 = 12

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Step-by-step explanation:

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4 years ago

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What expression is equivalent to 120?

Daniel [21]

Answer:

5! and 6p3

Step-by-step explanation:

5! = 5*4*3*2*1 = 120

6p3= n!/(n-r)!

where n = 6

and r = 3

6p3 = 6!/(6-3)!

= 6*5*4*3*2*1/3*2*1

= 120

3 0

4 years ago

I NEED MORE HELP..........

Vesnalui [34]

Answer:

Step-by-step explanation:

f(x) = 2x² - 5x - 15

g(x) = - 2x - 1

f(g(x)) = y

y = 2( - 2x - 1 )² - 5( - 2x - 1 ) - 15 =

2(4x² + 4x + 1) + 10x + 5 - 15 =

8x² + 8x + 2 + 10x + 5 - 15 =

4 0

2 years ago

A line through the points $(2, -9)$ and $(j, 17)$ is parallel to the line $2x + 3y = 21$. What is the value of $j$?

lys-0071 [83]

Answer:

j=-37

Step-by-step explanation:

step 1

Find the slope of the given line

we have

$2x+3y=21$

Convert to slope intercept form

Isolate the variable y

subtract 2x both sides

$3y=-2x+21$

divide by 3 both sides

$y=-\frac{2}{3}x+7$

The slope is

$m=-\frac{2}{3}$

step 2

we have the points

(2,-9) and (j,17)

Find the slope

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

substitute

$m=\frac{17+9}{j-2}$

$m=\frac{26}{j-2}$

Remember that

If two lines are parallel then their slope are equal

therefore

$\frac{26}{j-2}=-\frac{2}{3}$

$26(3)=-2(j-2)\\78=-2j+4\\2j=4-78\\2j=-74\\j=-37$

7 0

3 years ago