Answer:
10%
Step-by-step explanation:
3 more students this year
3/30 reduced= 1/10 or 10%
Answer:
17, 19 & 21
Step-by-step explanation:
The ratio of the circumferences equals the ratio of the radii.
so we need to find their radii
first circle's radius:
pir^2 = 6pi
r = √6
second circle's radius:
pir^2 = 150pi
r = √150
Their ratio is
√6 : √150 =
√6 : √6√25 =
√6 : 5√6 =
1 : 5
Problem:<span>Solve </span><span><span><span>y−<span>7x</span></span>=<span>−14</span></span>;<span><span><span>7y</span>−<span>49x</span></span>=<span>−2</span></span></span>Steps:I will try to solve your system of equations.<span><span><span><span>−<span>7x</span></span>+y</span>=<span>−14</span></span>;<span><span><span>−<span>49x</span></span>+<span>7y</span></span>=<span>−2</span></span></span>Step: Solve<span><span><span>−<span>7x</span></span>+y</span>=<span>−14</span></span>for y:<span><span><span><span>−<span>7x</span></span>+y</span>+<span>7x</span></span>=<span><span>−14</span>+<span>7x</span></span></span>(Add 7x to both sides)<span>y=<span><span>7x</span>−14</span></span>Step: Substitute<span><span>7x</span>−14</span>foryin<span><span><span><span>−<span>49x</span></span>+<span>7y</span></span>=<span>−2</span></span>:</span><span><span><span>−<span>49x</span></span>+<span>7y</span></span>=<span>−2</span></span><span><span><span>−<span>49x</span></span>+<span>7<span>(<span><span>7x</span>−14</span>)</span></span></span>=<span>−2</span></span><span><span>−98</span>=<span>−2</span></span>(Simplify both sides of the equation)<span><span><span>−98</span>+98</span>=<span><span>−2</span>+98</span></span>(Add 98 to both sides)<span>0=96</span>Answer:<span>No solutions.</span>