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lutik1710 [3]
4 years ago
11

Solve for x

ign="absmiddle" class="latex-formula">
Mathematics
1 answer:
Makovka662 [10]4 years ago
8 0

Answer:

  x = -7

Step-by-step explanation:

Subtract 15 from both sides of the equation.

  x = 8 -15 = -7

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The quantity r varies jointly with t and u and inversely with s when t= -12, u= -7, and s= -4, r= -126. Find r when t= -8, u= 8,
vichka [17]

Answer:

r = 64

Step-by-step explanation:

r = (k*t*u)/s

Where,

k = constant of proportionality

t = -12,

u= -7,

s= -4,

r= -126.

r = (k*t*u)/s

-126 = (k*-12*-7)/-4

-126 * -4 = 84k

504 = 84k

k = 504/84

k = 6

Find r when t= -8, u= 8, and s= -6.

r = (k*t*u)/s

= (6*-8*8) / -6

= -384 / -6

= 64

r = 64

6 0
3 years ago
Rewrite the rational exponent as a radical by extending the properties of integer exponents.
Aloiza [94]

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\bf \cfrac{11^{\frac{2}{5}}}{11^{\frac{1}{4}}}\implies 11^{\frac{2}{5}}\cdot 11^{-\frac{1}{4}}\implies 11^{\frac{2}{5}-\frac{1}{4}}\implies 11^{\frac{8-5}{20}}\implies 11^{\frac{3}{20}} \\\\\\ \sqrt[20]{11^3}\implies \sqrt[20]{1331}

5 0
3 years ago
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A 500 g model train car traveling at 0.8 m/s collides with a 300 g stationary car. The cars hook up and move off down the track
sdas [7]

Answer:

0.5ms^{-1}

Step-by-step explanation:

Let v be the speed after the collision of both the cars.

Now, momentum is given by: mass × velocity, then by equating the total momentum before and after the collision of the two cars, we get

500{\times}0.8+300{\times}0=(500+300)v

⇒400+0=800v

⇒400=800v

⇒v=0.5ms^{-1}

Thus, they are moving at the velocity of 0.5ms^{-1}

3 0
3 years ago
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6x + 3x² – x – x²<br> yeah im bad at math<br> please help !
juin [17]

Answer:

 x • (2x + 5)

Step-by-step explanation:

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "x2"   was replaced by   "x^2".  1 more similar replacement(s).

STEP

1

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Equation at the end of step 1

 ((6x +  3x2) -  x) -  x2

STEP

2

:

STEP

3

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Pulling out like terms

3.1     Pull out like factors :

  2x2 + 5x  =   x • (2x + 5)

5 0
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I don't know just someone answer this for me thanks
lesya692 [45]

Answer:

the answer would be 43 degrees.

Step-by-step explanation:

8 0
3 years ago
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