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slega [8]
3 years ago
12

3a+5b-9: a=2, b=3 that is my question I need help

Mathematics
2 answers:
omeli [17]3 years ago
8 0
Replace a=2 and b=3 into the a and b in the equation to get, 3(2)+5(3)-9=12
Zigmanuir [339]3 years ago
7 0

Answer:

12

Step-by-step explanation:

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I have chosen 1 playing cards .what is the probability of being red or red ace?
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Answer:50% red 4/42 ace

Step-by-step explanation:

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3 years ago
As an estimation we are told 5 miles is 8 km. <br> Convert 68 km to miles.
ArbitrLikvidat [17]

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42 miles

Step-by-step explanation:

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3 years ago
What is the smallest and largest perimeter of a polygon with an area of 20?
DENIUS [597]

Answer:

The polygon with the smallest perimeter is the megagon

The polygon with the largest perimeter is the triangle

Step-by-step explanation:

An equilateral triangle with area = 20 has

0.5× a²×sin60 = 20

a= 6.796

Hence, perimeter = 20.39

A square of area 20 has perimeter= 4×√20 = 17.9

A regular pentagon of area = 20 has perimeter = 3.41 × 5 = 17.05

Hence as the number of sides is increasing, the ratio of the Area to the Perimeter also increases

Therefore, a triangle has the largest perimeter with an area of 20 while a megagon with a million sides has the smallest perimeter with an area of 20.

4 0
3 years ago
A 25-foot streetlight casts a showdown 20feet long.If Melanie is standing at the end of the shadow casted by a 60. -foot tall bu
natka813 [3]
Melanie is 48 feet away from the building.
Heres my working

20% of 25=20 so 20% of 60=48.
Hope this helped ☺️
7 0
3 years ago
Find the GCF (Greatest Common Factor) of 64 and 144
valkas [14]

Answer: 16

Step-by-step explanation:

if we were to list all the factors of 64 and 144

64= 1,2,4,8,8,16,32,64

144= 1,2,3,4,6,8,9,12,12,16,18,24,36,48,72,144

therefore the GCF of 64 and 144 is 16

3 0
3 years ago
Read 2 more answers
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