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muminat
3 years ago
6

Adam is three years older than Joe. After three years, Adam's age will be four years less than two times Joe's age. Considering

Adam's present age as x years and Joe's present age as y years, write a pair of linear equations to model the above situation.
Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
3 0

Answer:

X = 3+y

X = 2y - 4

Step-by-step explanation:

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which has greater cenetic energy a car traveling 30.0 km/hr or one twice as heavy traveling at 15 km/hr?​
iVinArrow [24]

Answer:

30 km/h car

Step-by-step explanation:

From analysis the   car traveling at 30 km/h has greater kinetic energy

we can deduce it from the expression of kinetic energy which is

KE=\frac{1}{2} mv^2

Assuming the mass m= 1 kg

 

For the 30 km/h

KE=\frac{1}{2}*1*30^2 \\\\KE=\frac{1}{2}*1*900\\\\\KE=450 J

   

For the 15 km/h

KE=\frac{1}{2}*2*15^2 \\\\ KE=\frac{1}{2}*2*225 \\\\\ KE=\frac{1}{2}*450 J\\\\\ KE=225 J

Though the kinetic energy is a function of mass and velocity, but from our analysis the faster moving object has more KE

8 0
3 years ago
4-7x +3 +5x pleas help thanks
meriva

Answer:

7−2x

Step-by-step explanation:

1 Collect like terms.

(4+3)+(-7x+5x)

(4+3)+(−7x+5x)

2 Simplify.

7-2x

7−2x

3 0
2 years ago
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The dimensions of a rectangular prism can be expressed as width w,length w+4, and height 5-w.What is the approximate width (w) t
k0ka [10]

The solution is in the attachment

5 0
3 years ago
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Find cos B, sinB,tanb
emmasim [6.3K]

Using right triangle relations, we will get:

  • tan(B) = 1.05
  • sin(B) = 0.735
  • cos(B) =  0.7

<h3>How to find the value of the trigonometric equations?</h3>

We assume that bot triangles are equivalent, then the angle B will be the same as the angle Z.

Now remember the relations:

  • tan(θ) = (opposite cathetus)/(adjacent cathetus).
  • sin(θ) = (opposite cathetus)/(hypotenuse)
  • cos(θ) = (adjacent cathetus)/(hypotenuse).

If we step on angle B, we have:

  • opposite cathetus = 29.4
  • adjacent cathetus = 28
  • hypotenuse = 40.6

Replacing that, we get:

  • tan(B) = 29.4/28 = 1.05
  • sin(B) = 29.4/40.6 = 0.735
  • cos(B) = 28/40.6 = 0.7

If you want to learn more about trigonometric functions:

brainly.com/question/8120556

#SPJ1

6 0
2 years ago
Which Choice is equivalent to the quotient shown here when x is greater or equal to 0
m_a_m_a [10]

\sqrt{ \frac{27x}{48} }  =  \sqrt{ \frac{ {3}^{3}x}{ {2}^{4} \times 3 } }  =   \sqrt{ \frac{ {3}^{2}x }{ {2}^{4} } }  =  \frac{3 \sqrt{x} }{4}
6 0
3 years ago
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