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IrinaVladis [17]
2 years ago
7

i am confused i don't know how to solve this maybe someone on here can solve it but here is it Solve. 21r<7

Mathematics
2 answers:
Nataliya [291]2 years ago
6 0

Answer:

r < \frac{1}{3}

Step-by-step explanation:

Given

21r < 7 ( isolate r by dividing both sides by 21 )

r < \frac{7}{21} , that is

r < \frac{1}{3}

DiKsa [7]2 years ago
5 0

Answer:

r<-3

Step-by-step explanation:

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Two cars start from the same point driving in opposite directions. Both cars drive 6miles. One car stops, the other car makes a
dimaraw [331]

Answer:

  • <u>14.4 mile</u>²

Explanation:

1. By driving 6 miles each, the cars will be 6 miles + 6 miles = 12 miles appart.

2. When one car stops and the other car makes a 90° left-hand turn and drive 8 miles, you can model the situation with a right triangle, where one leg is 12 miles, the other leg is 8 miles, and the hypotenuse is the distance that separates the cars.

Hence, you must use Pythagoras to find that distance.

3. Pythagoras

  • hypotenuse² = leg₁² + leg₂²

  • hypotenuse = (12 mile)² + (8 mile)² = 144 mile² + 64 mile² = 208 mile²

  • hypotenuse=\sqrt{208mile^2}=14.4mile^2, which is rounded to the neartest tenth of a mile.
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3 years ago
Write the following fractions greater than 1as a sum of two products
cestrela7 [59]
What are the following fractions
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3 years ago
Find the values of a and b such that
Varvara68 [4.7K]

Answer:

a = 1.5

b = 1.75

Step-by-step explanation:

First, we need to solve (x+a)^2 and replace the result in the initial equation as:

x^2+3x+4=(x+a)^2+b\\x^2+3x+4=x^2+2ax+a^2+b

Then, this equality apply only if the coefficient of x is equal in both sides and the constant is equal in both sides.

It means that we have two equations:

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Finally, replacing the value of a in the second equation and solving for b, we get:

4=a^2+b\\4=1.5^2+b\\b=4-1.5^2\\b=4-2.25\\b=1.75

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3 years ago
How can i use inverse operations to write the related multiplication and division sentences???
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Both are related because u can multiply the answer to find a devision problem and you can divide a answer to find ur multiplication problem and find ur answer hope this helps 

8 0
3 years ago
A scientist is studying the growth of a particular species of plant. He writes the following equation to show the height of the
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Answer:

Step-by-step explanation:

A) 16.13 = 12(1.03)ⁿ

   1.344 = (1.03)ⁿ

ln(1.344) = n(ln(1.03))

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