Answer:
right trianlge i think
Step-by-step explanation:
Answer:
-12
Step-by-step explanation:
use a number line go back 8 spaces from 19 and back from negative 4
Answer:
If rounding up it is 1
Step-by-step explanation:
the nearest whole number is 1.
1 x 10 = 10
16 x 1 = 16
10 + 16 =
26
Answer:
6kg pure copper and 30 kg 10% copper was mixed to give 36kg of 25% alloy
Step-by-step explanation:
Here, we want to produce 36 kg of 25% alloy
Let the Pure copper be x kg while 10% alloy be y kg
Pure copper is simply 100% copper
Thus;
x + y = 36 •••••(i)
Then;
100% of x + 10% of y = 25% of 36
= x + 0.1y = 9 •••••• ii)
From i x = 36-y
from ii, x = 9-0.1y
Equate both x
36-y = 9-0.1y
36-9 = 0.1y + y
0.9y = 27
y = 27/0.9
y = 30
x = 36-y
x = 36-30
x = 6 kg
