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IrinaVladis [17]
3 years ago
7

How do you Solve. 21r<7

Mathematics
2 answers:
myrzilka [38]3 years ago
7 0

Answer:

r <  \frac{1}{3}  \\

Step-by-step explanation:

21 \: r < 7 \\  \frac{21 \: r}{21}  <  \frac{7}{21}  \\ r <  \frac{1}{3}

<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em>

<em>brainliest</em><em> </em><em>appreciated</em>

<em>good</em><em> </em><em>luck</em><em>!</em><em> </em><em>have</em><em> </em><em>a</em><em> </em><em>nice</em><em> </em><em>day</em><em>!</em><em> </em>

kirza4 [7]3 years ago
4 0

Answer:

r < 1/3

Step-by-step explanation:

21r<7

Divide each side by 21

21r/21<7/21

r < 1/3

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Solve for a. ​ 1/3(21−3a)=6−a​ a.−1 b.0 c.no solution d.all real numbers
kifflom [539]
1/3(21 - 3a) = 6 - a
7 - a = 6 - a
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Therefore, the equation has no solution.
3 0
3 years ago
If a= 2^x and b =2^x+1; show that: 8a^3 / b^3 = 2^x+1​
kkurt [141]

Step-by-step explanation:

Given that:

a = 2ˣ

b = 2ˣ⁺¹ = 2ˣ * 2¹ = 2.2ˣ

Now,

{(8a³)/b²}

Substitute the value of x and y in expression then

= [{8(2ˣ)³}/(2.2ˣ)²]

= [(8*2³ˣ)/{2² * (2ˣ)²}]

= {(8*2³ˣ)/(4 * 2²ˣ)}

[since, (aᵐ)ⁿ = aᵐⁿ]

= {(2 * 2³ˣ)/2²ˣ}

= {(2 * 2²ˣ * 2ˣ)/2²ˣ}

[since (2a = a+a, that means 3x = 2x + x)]

= 2 * 2ˣ

= 2ˣ⁺¹

[since (aᵐ * aⁿ = aᵐ+ⁿ)]

<u>Answer:</u> Therefore, {(8a³)/b²} = 2ˣ⁺¹ .

Please let me know if you have any other.

7 0
2 years ago
Can someone help me plzz??
Hoochie [10]
Before=12/15 after=15/16
6 0
4 years ago
A garden table and a bench cost $450 combined. The cost of the garden table is two times the cost of the bench. What is the cost
SIZIF [17.4K]
900 all you have to do is add you add 450 +450 so you get 900 see easy
7 0
4 years ago
What is the axis of symmetry of h(x) = –2x2 + 12x – 3?
murzikaleks [220]
The axis of symmetry is the x value of the vertex
we have a handy-dandy way of finding that from standard form, ax^2+bx+c=y

for
ax^2+bx+c=y
the x value of the vertex is -b/2a

y=-2x^2+12x-3
-b/2a=-12/(2*-2)=-12/-4=3

x=3 is the axis of symmetry
5 0
4 years ago
Read 2 more answers
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