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fredd [130]
3 years ago
5

If [2/5]2 = [x/25], then x = ______.

Mathematics
1 answer:
Vilka [71]3 years ago
6 0

Answer:

x = 20

Step-by-step explanation:

{2/5}2 is 0.8

0.8 = x/25

Rearrange the equation now so:

0.8*25 = x

x = 20

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A bouncy ball is dropped such that the height of its first bounce is 6.25 feet and each
bija089 [108]

Answer:

0.67 feet

Step-by-step explanation:

This question can be interpreted as find the 11th term of a geometry progression where a = 6.25 and r = 80%

So, we have:

T_n = ar^{n-1}

In this case:

r - 80\% = 0.8

n = 11

So, we have:

T_{11} = 6.25 * 0.8^{11-1}

T_{11} = 6.25 * 0.8^{10}

T_{11} = 6.25 * 0.1073741824

T_{11} = 0.67ft

Hence, the height of rebound at the 11th time is approximately 0.67

7 0
3 years ago
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the phoenix store sells two diferent packages of colored pencils. Package a contains 6 pencils and cost $3.48. brand b contains
ASHA 777 [7]

Answer:

Difference in dollars: $3.01

Step-by-step explanation:

3 0
3 years ago
What is the range of the function y= -|x|
Katen [24]
Hello, again!!

So, the range is the outcome when you plug in any x. In other words, the y.
Because this is absolute value, the x will turn positive. However, the number will then turn negative.
Therefore, y will ALWAYS be negative.

The answer is C.

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4 0
4 years ago
Which equation shows the quadratic formula used correctly to solve 7x2 = 9 + x for x?
kenny6666 [7]

Answer:

B

Step-by-step explanation:

3 1
3 years ago
Rose walks 2 2/3 km in three-fifths of an hour. If her speed remains unchanged, how many kilometres can she walk in one and thre
Artyom0805 [142]

Answer:

Distance = 7 7/9 Km

Step-by-step explanation:

Given the following data;

Distance = 2⅔ = 8/3 Km

Time = ⅗ hour

First of all, we would find her speed;

Speed = distance/time

Speed = (8/3)/(3/5)

Speed = 8/3 * 5/3

Speed = 40/9 km/h

Next, we would find the distance covered when time = 1¾ hours

Distance = speed * time

Distance = 40/9 * 1¾

Distance = 40/9 * 7/4

Distance = 10/9 * 7

Distance = 70/9

Distance = 7 7/9 Km

5 0
3 years ago
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