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givi [52]
3 years ago
7

Will mark as brainliest if correct

Mathematics
2 answers:
bearhunter [10]3 years ago
8 0
Log r+log 4=3
log(4xr)=3
log base 10(4r)=3
4r=10^3
4r=1000
r=1000/4
r=250
Greeley [361]3 years ago
4 0

Answer:

r=250

Step-by-step explanation:

log10(r) + log10(4)=3

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What are the scale factor of ABC dilated to XYZ plz help
jekas [21]
<h3>Answer:  B) 2/3</h3>

====================================

Explanation:

The order is important for ABC and XYZ so we can see what letters pair up.

  • A pairs with X since they are the first letters
  • B pairs with Y since they are the second letters
  • C pairs with Z since they are the third letters

Based on that, we can see that AB pairs with XY as they are the first two letters of ABC and XYZ respectively.

Divide the length XY over AB and reduce

XY/AB = 10/15 = 2/3

We could also divide XZ over AC

XZ/AC = 14/21 = 2/3

and we get the same ratio

6 0
3 years ago
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Equation of a straight line (see attached)
Viefleur [7K]

Answer:

y = 2x - 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = A(4, 7) and (x₂, y₂ ) = B(2,3)

m = \frac{3-7}{2-4} = \frac{-4}{-2} = 2 , thus

y = 2x + c ← is the partial equation

To find c substitute either of the 2 points into the partial equation

Using (2, 3), then

3 = 4 + c ⇒ c = 3 - 4 = - 1

y = 2x - 1 ← equation of line

8 0
4 years ago
Read 2 more answers
An observer (O) spots a plane flying at a 55° angle to his horizontal line of sight. If the plane is flying at an altitude of 21
xz_007 [3.2K]

Answer:

<em>B. 25,636 feet</em>

Step-by-step explanation:

sin(55) = h/x

h = 21,000

sin(55) = 21,000/x

x = 21,000/sin(55)

x = 25636.27 ≈ 25,636 feet

Hope this helped! :)

3 0
3 years ago
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Round 5,434 to the nearest thousand.
prohojiy [21]
Your answer is 4,000
8 0
3 years ago
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What is the result when 124 is increased by 6.5%
jekas [21]
You multiply 124 (0.065) which gets you 8.06. You then add 8.06 to 124 and you get 132.06.
7 0
4 years ago
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