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gregori [183]
3 years ago
12

What does 21 over 8 equals

Mathematics
1 answer:
stiv31 [10]3 years ago
8 0
The answer of 21 over 8... 21/8=2.625
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12x+7<-11 or 5x-8>40
puteri [66]

Answer:

\large\boxed{x9\dfrac{3}{5}\to x\in\left(-\infty,\ -1\dfrac{1}{2}\right)\ \cup\ \left(9\dfrac{3}{5},\ \infty\right)}

Step-by-step explanation:

12x+7

5x-8>40\qquad\text{add 8 to both sides}\\\\5x-8+8>40+8\\\\5x>48\qquad\text{divide both sides by 5}\\\\\dfrac{5x}{5}>\dfrac{48}{5}\\\\x>\dfrac{48}{5}\\\\x>9\dfrac{3}{5}\\===========================

x9\dfrac{3}{5}

7 0
3 years ago
Help plzzz...also give steps
geniusboy [140]

Answer:

392π

Step-by-step explanation:

Equation is 1/3(piR^2)*h

Radius is 7, 7 squared is 49.

1/3(49π)(24)

392π

3 0
3 years ago
Read 2 more answers
The sum of two numbers is 30 and their difference is 12
Elina [12.6K]
The correct answer is 21 and 9. 21+9=30 and 21-9=12. Hope this helps.
6 0
3 years ago
What does y equal in y/-3 =1/6? PLEASE HELP WILL GOVE BRAINLIEST
kipiarov [429]
Y=-1/2

Multiply the numerator of the first fraction by the denominator of the second fraction. Set this equal to the product of the denominator of the first fraction and the numerator of the second fraction.<span><span>(y)</span>⋅<span>(6)</span>=<span>(−3)</span>⋅<span>(1<span>)

</span></span></span>Simplify the left side.<span><span>6y=<span>(−3)</span>⋅<span>(1)</span></span><span>6y=<span>(-3)</span>⋅<span>(1)</span></span></span>
Simplify the right side.<span><span>6y=−3</span><span>6y=-3</span></span>
Divide each term by <span>66</span> and simplify.y=-1/2
5 0
3 years ago
A rectangular pool has dimensions of 40 feet and 60 feet. The pool has a patio area around it that is the same width on all side
tankabanditka [31]
<span>0*60=2,400 ft^2 is the area of the pool.
(40+2x)(60+2x)=2*2,400
2400+120x+80x+4x^2=4,800
4x^2+200x+2,400-4,800=0
4x^2+200x-2,400=0
4(x^2+50x-600)=0
</span><span>4(x-10)(x+60)=0
x-10=0
x=10 ans. for the width of the patio.
Proof:
(40+2*10)(60+2*10)=2*2,400
(40+20)(60+20)=4,800
60*80=4,800
4,800=4,800</span>
5 0
3 years ago
Read 2 more answers
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