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notsponge [240]

3 years ago

7

A number plus twice the number is equal to three times the number

2 answers:

Helga [31]3 years ago

5 0

Let the unknown value be x
A number > x
Plus> x+?
twice>x+2
the number>x+2x
is equal to>x+2x=
three times the number> x+2x=3x
3x+3x

Lina20 [59]3 years ago

3 0

a+2a=3a
3a=3a
The answer is infinetly many solutions.

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ser-zykov [4K]

$3^{x + 2}$ - $3^{x}$ = $3^{x}$ * $3^{2}$ - $3^{x}$ = 9( $3^{x}$ ) - 1( $3^{x}$ ) = 8( $3^{x}$ )

$3^{x + 2}$ - $3^{x}$ = $\frac{8}{9}$

⇒ 8( $3^{x}$ ) = $\frac{8}{9}$

⇒ $3^{x}$ = $\frac{1}{9}$ <em>multiplied both sides by 8</em>

⇒ $3^{x}$ = $\frac{1}{3^{2} }$

⇒ $3^{x}$ = 3⁻²

⇒ x = -2

Answer: x = -2

6 0

3 years ago

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Marina86 [1]

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8 0

3 years ago

What is the equation of 1/2x =5/6

LekaFEV [45]

Step-by-step explanation:

$\frac{1}{2}x = \frac{5}{6}$

$2 \times \frac{1}{2}x = 2 \times \frac{5}{6}$

$x = \frac{5}{3}$

4 0

3 years ago

Easy variable question pls help

svet-max [94.6K]

Answer:

z = -4 1/2

Step-by-step explanation:

1. First change the mixed fractions to improper fractions so it's easier

$\frac{16}{5\\}/(z-\frac{1}{2}) = \frac{8}{3}/(z+\frac{1}{3})$

2. Simplify

$\frac{32}{5(2z-1)} = \frac{8}{3z+1}$

3. Cross multiply

$32(3z+1) = 5(2z-1) * 8$

4. Simplify again (distributive property)

$32(3z+1) = 40(2z-1)$

5. Distributive property

$32(3z+1) -> 96z+32$

$40(2z-1) -> 80z-40$

$96z+32=80z-40$

6. Subtract 32 from both sides

$96z+32-32 = 80z-40-32$

7. Simplify

$96z = 80z-72$

8. Subtract 80 from both sides

$96z-80z=80z-72-80z$

9. Simplify

$16z=-72$

10. Divide both sides by 16

$\frac{16z}{16}=\frac{-72}{16}$

11. Simplify

$z=-\frac{9}{2} -> also = -4\frac{1}{2}$

Sorry if it was too long but hope this helps! :)

And also try using symbolab cuz it gives step by step explanations it's really good!

7 0

3 years ago

Please hurry I’m in a timed test!!!! If sintheta>0, and tan theta<0 then:

Trava [24]

Answer: The angle is in the second quandrant

Step-by-step explanation:

If sin of theta is greater than 0, the angle theta has to be in either the first or second quandrant. If tangent of theta is less than 0, it cannot be in the first or third quandrant. Therefore, we know the angle is in the second quandrant.

5 0

3 years ago