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2 years ago

14

• Now suppose a cicada comes out every 8 years instead of 7 years. How many years will go by before the cicada and predator appe

ar at the same time again

1 answer:

rodikova [14]2 years ago

7 0

10 years will go by before the predator and cicada appear at the same time again

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Find the unit rate in feet per second <br> 300 yards over 1 minute

arlik [135]

In order to find the unit rate in ft / sec of 300 yards / min. We first have to elicit the conversion values for each unit of measurement, this will allows us identify how much will we multiply in order to get the goaled value.
Conversion values:
<span><span>1.    </span>1 yard = 3 feet</span>
<span><span>2.    </span>1 minute = 60 seconds</span>

Solution: <span><span>
1.    </span>300 yards x 3 feet/1 yard = 900 feet</span>
<span><span>2.    </span>1 minute x 60 seconds / 1 minute = 60 seconds</span>

Thus, 900ft/60sec

7 0

2 years ago

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The area of a rectangle is 105 square centimeters. The width of the rectangle is 7 centimeters. What is the perimeter of the rec

Ulleksa [173]

44 because 105 ÷ 7 = 15.
So (7*2)+(15*2)=44

5 0

3 years ago

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Factorise the following:<br> a) x + 3x - 4<br> b) x - 2x - 3<br> c) x + 2x - 8

Komok [63]

Are they supposed to be quadratic equations? Is it x^2 +3x -4 etc?

8 0

2 years ago

The perimeter of a kite is 50 mm. The length of one of its sides is 1 mm more than twice the length of another. Find the length

rosijanka [135]

Answer:

The length of the longest side is 13mm

Step-by-step explanation:

Represent the two sides with a and b, where a is the longest

$Perimeter = 50$

$a=b + 1$

Required

Determine the length of the longest side

Perimeter of a kite is calculated as thus:

$Perimeter = 2(a + b)$

Make b the subject in $a=b + 1$

$b = a -1$

Substitute a - 1 for b and 50 for Perimeter in $Perimeter = 2(a + b)$

$50 = 2(a + a - 1)$

Divide through by 2

$25 = a + a - 1$

$25 = 2a- 1$

Add 1 to both sides

$25 + 1 = 2a - 1 +1$

$25 + 1 = 2a$

$26 = 2a$

Solve for a

$a = 26/2$

$a = 13$

<em>Hence, the length of the longest side is 13mm</em>

4 0

2 years ago

Some one plz help me 25 points

qaws [65]

C, a²+b²=c²

why does this have to be 20 characters long

5 0

3 years ago