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3 years ago

4(x−0.8)=3.8x−5.8 PLZZZ ANSWER FAST!

2 answers:

5 0

To find the answer:
$4(x - 0.8) = 3.8x - 5.8 \\ 4x - 3.2 = 3.8x - 5.8 \\ 4x - 3.8x = - 5.8 + 3.2 \\ 0.2x = - 2.6 \\ x = - \frac{ 2.6}{0.2} \\ x = - 13$

Therefore, x=-13.

Hope it helps!

Lapatulllka [165]3 years ago

3 0

Answer: The required solution is x = -13.

Step-by-step explanation: We are given to solve the following linear equation in variable x :

$4(x-0.8)=3.8x-5.8~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

Solving equation (i) means finding the value of the unknown variable x.

The solution of equation (i) is as follows :

$4(x-0.8)=3.8x-5.8\\\\\Rightarrow 4x-3.2=3.8x-5.8\\\\\Rightarrow 4x-3.8x=3.2-5.8\\\\\Rightarrow 0.2x=-2.6\\\\\Rightarrow x=-\dfrac{2.6}{0.2}\\\\\Rightarrow x=-13.$

Thus, the required solution is x = -13.

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What is 0.92 / 7 as a speed

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Answer:

The answer is 0.13.

Step-by-step explanation:

The formula for speed is distance divided by time. 0.92 / 7 = 0.13.

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2 years ago

2. Calculate the energy in joules of a photon whose frequency is 7.55×1014 Hz.

igomit [66]

The energy of a photon is given by
E = h × v

where:
E is the energy in joules/photon
'h' is the constant 6.63 × 10⁻³⁴
'v' is the frequency 7.55 × 10¹⁴

Substitute 'h' and 'v' into the formula we have

E = (6.63×10⁻³⁴) × (7.55×10¹⁴)
E = (6.63×7.55) × (10⁻³⁴ × 10¹⁴)
E = 50.0565 × 10⁽⁻³⁴⁺¹⁴⁾
E = 50 × 10⁻²⁰ joules/photon

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3 years ago

59 and/or 60. Determine if the triangles are similar. If they are similar, find the scale factor from ABC to JKL.

navik [9.2K]

9514 1404 393

Answer:

59) not similar

60)

Step-by-step explanation:

59) The ratios of the side lengths shown cannot be reduced. They are different, so the triangles are not similar.

7:8:12 ≠ 6:7:11

60) The side length ratios both reduce to 8:7:10, so the triangles are similar.

∆ABC ~ ∆JKL

The scale factor is LJ/CA = 25/20 = 5/4. (Multiplying ABC by 5/4 will give JKL.)

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2 years ago

If a club charges dues of $200 a year, it will have 50 members. For each $5 it raises its dues, it loses a member. USE AN EQUATI

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Answer:

The value is $y = \$ 225$

Step-by-step explanation:

From the question we are told that

The amount charge per year is $k = \$ 200$

The number of members it will have at this amount is $n = 50$

The amount amount increase that will lead to the loss of a single member is $z = \$ 5$

Generally the total amount the club would obtain from its members is mathematically represented as

$I = Amount \ due\ paid * Number \ of members$

Now let x denote the number of member lost

Hence

$I = (k + zx) (n-x )$

=> $I = (200 + 5x) (50-x )$

=> $I = 10000+50x-5x^2$

Thus the number of members that be removed to give the maximum income from dues is obtained by differentiating the above equation and equating it to zero

$\frac{dI}{dx} = 50-10x$