Answer:
20%
Step-by-step explanation:
because 15/75×100 =1/5×100=20%
<span><span>The answer would be 2
-8/2</span>÷<span>6/-3
</span></span><span>=<span>-8 × -3/2 × 6
</span></span><span>=<span>24/12
</span></span><span>=<span>24 ÷ 12/12 ÷ 12
</span></span><span>=<span>2
</span></span>
Answer:
8x+10y=160
Step-by-step explanation:
x could equal 20 and y can be 0 or x can be 0 and y is 16.
Step-by-step explanation:
If x is the mass of 30% copper alloy, and y is the mass of 65% copper alloy, then:
x + y = 80
0.30x + 0.65y = 0.51(80)
Solving the system of equations using substitution:
0.30x + 0.65(80 − x) = 0.51(80)
0.30x + 52 − 0.65x = 40.8
11.2 = 0.35x
x = 32
y = 80 − x
y = 48
The metalworker needs 32 kg of 30% copper alloy and 48 kg of 65% copper alloy.
Answer:
D
Step-by-step explanation:
The starting point is B and the ray extends towards A.
So the asnwer is D.
