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Makovka662 [10]
3 years ago
14

Use substitution to solve this problema=5, b=25a - b = ‽​

Mathematics
1 answer:
Rom4ik [11]3 years ago
3 0
Plug the numbers into the equation

5(5) - 2 = ?

25 -2 = 23

23
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Dan solves 6p=5-3p in the way shown below. Which properties did Dan use for Step 1 and Step 2?
il63 [147K]

Answer:

Both the addition property of equality and the additive identity property

Step-by-step explanation:

we know that

The <u>addition property of equality</u> states that if the same amount is added to both sides of an equation, then the equality is still true

The <u>additive identity property</u> says that if you add a real number to zero or add zero to a real number, then you get the same real number back

we have

6p=5-3p

step 1

Applying the addition property of equality adds 3p both sides

6p+3p=5-3p+3p

step 2

Applying the additive identity property

6p+3p=5+0

step 3

9p=5

step 4

p=5/9

4 0
3 years ago
Read 2 more answers
A designer wants to create a whisper chamber in the shape of an ellipse. He has a warehouse space with a longest length of 40 me
luda_lava [24]

Answer: the answer is 19.4m

Step-by-step explanation:

5 0
3 years ago
What is the equation of a line that passes through the point (6,3) and is perpendicular to a line with a slope of -3/2
SCORPION-xisa [38]

Answer:

  none of the above

Step-by-step explanation:

The perpendicular line will have a slope that is the negative reciprocal of the given slope, so it is ...

  m = -1/(-3/2) = 2/3

The point-slope form of the equation of the line with slope m through point (h, k) can be written ...

  y = m(x -h) +k

For this slope and the point (6, 3), the equation of the line is ...

  y = (2/3)(x -6) +3

  y = 2/3x -4 +3

  y = 2/3x -1 . . . . . matches none of the offered choices

_____

The attached graph shows this equation is the one that goes through the given point.

3 0
4 years ago
Simplify, and Write answer without parentheses
zaharov [31]

Answer:

w^18

Step-by-step explanation:

exponents are multiplied when there is a parenthesis between them

3 0
3 years ago
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If a snowball melts so that its surface area decreases at a rate of 5 cm2/min, find the rate (in cm/min) at which the diameter d
rosijanka [135]

Answer:

0.0221 cm/min

Step-by-step explanation:

Surface area of a snowball:

An snowball has a spherical format.

The surface area of an sphere is given by:

A = 4\pi r^2

In which r is the radius(half the diameter). So in function of the diameter, we have that:

A = 4\pi (\frac{d}{2})^2 = \pi d^2

Implicit derivative:

To solve this question, we need to find the implicit derivative of A in function of t.

The variables are A and d, so:

\frac{dA}{dt} = 8\pi d \frac{dd}{dt}

Its surface area decreases at a rate of 5 cm2/min

This means that \frac{dA}{dt} = -5

Find the rate (in cm/min) at which the diameter decreases when the diameter is 9 cm

This is \frac{dd}{dt} when d = 9. So

\frac{dA}{dt} = 8\pi d \frac{dd}{dt}

-5 = 8\pi*9 \frac{dd}{dt}

\frac{dd}{dt} = -\frac{5}{72\pi}

\frac{dd}{dt} = -0.0221

This means that the diameter decreases at a rate of 0.0221 cm/min when the diameter is 9 cm.

6 0
3 years ago
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