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I am Lyosha [343]
3 years ago
14

Which of these numbers is prime? large 11, 15, 21, 27, 56

Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
6 0
11 is the only prime number. It's only multiples are 1 and itself
vaieri [72.5K]3 years ago
5 0
11 because only 1 times 11 = 11 and it has no other factors 
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X+y=120 <br>5.25x+3.0y=517.2
Sauron [17]
I will try to solve your system of equations.<span><span><span>
x+y</span>=120</span>;<span><span><span>5.25x</span>+<span>3y</span></span>=517.2</span></span>
Step: Solve<span><span>x+y</span>=120</span>for x:<span><span><span>
x+y</span>+<span>−y</span></span>=<span>120+<span>−y</span></span></span>(Add -y to both sides)<span>x=<span><span>−y</span>+120</span></span>
Step: Substitute<span><span>−y</span>+120</span>forxin<span><span><span><span>5.25x</span>+<span>3y</span></span>=517.2</span>:</span><span><span><span>
5.25x</span>+<span>3y</span></span>=517.2</span><span><span><span>5.25<span>(<span><span>−y</span>+120</span>)</span></span>+<span>3y</span></span>=517.2</span><span><span><span>−<span>2.25y</span></span>+630</span>=517.2</span>(Simplify both sides of the equation)<span><span><span><span>−<span>2.25y</span></span>+630</span>+<span>−630</span></span>=<span>517.2+<span>−630</span></span></span>(Add -630 to both sides)<span><span>−<span>2.25y</span></span>=<span>−112.8</span></span><span><span><span>−<span>2.25y</span></span><span>−2.25</span></span>=<span><span>−112.8</span><span>−2.25</span></span></span>(Divide both sides by -2.25)<span>y=50.133333</span>
Step: Substitute50.133333foryin<span><span>x=<span><span>−y</span>+120</span></span>:</span><span>
x=<span><span>−y</span>+120</span></span><span>x=<span><span>−50.133333</span>+120</span></span><span>x=69.866667</span>(Simplify both sides of the equation)
Answer:<span><span>
x=<span><span>69.866667<span> and </span></span>y</span></span>=<span>50.133333</span></span>
4 0
3 years ago
The Double Scoop ice cream store ordered 100 pints of vanilla ice cream. How many quarts of ice cream did the store order?
schepotkina [342]

Answer:

50 quarts.

Step-by-step explanation:

One pint is half a quart.

100/2 = 50

100 pints should be 50 quarts.

Hope this helps!

8 0
3 years ago
Yoshi is 5% taller today than she was one year ago. Her current height is 168 cm. How tall was she one year ago
NemiM [27]
155.6 CM
I divided 168 by 100 to find 1% then i got 1.68cm then I times that by 5 to find 5% which was 8.4cm. Finally I subtracted 168 and 8.4 to get 155.6 CM
I hope that helped :)
5 0
3 years ago
Read 2 more answers
Todd plans to swim 900 yards in a pool. So far Todd has swam 720 yards. What percentage of the total has Todd completed?
ella [17]

Answer:im pretty sure its 64.8

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
In a company, 37% of 1500 employees are females.work out the number of males in the company.
a_sh-v [17]
Formula:

y = p\% \times x
p = 37\% \div 100 = 0.37
y = 0.37 \times 1500 = 555
so there are 555 woman working.
1500 - 555 = 945
there are 945 men working

6 0
3 years ago
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