Henry is mixing concrete. To make concrete he needs to mix cement, sand and gravel in the ratio 3 : 2 : 7 by weight.
Henry needs to make 180kg of concrete.
He has 46kg of cement, 29kg of sand and 105kg of gravel.
Which ingredient is Henry short of?

9514 1404 393

  1 kg of sand

Step-by-step explanation:

For 180 kg of concrete using the given ratios, you need ...

  (3/12)(180 kg) = 45 kg of cement

  (2/12)(180 kg) = 30 kg of sand

  (7/12)(180 kg) = 105 kg of gravel

The inventory of 29 kg of sand is 1 kg short of the amount needed.

Henry is short 1 kg of sand.

-10i^2-4i

step-by-step explanation:

evaluate for p=2,q=5i

(2−4)(2+5i)i

(2−4)(2+5i)i

=−10i2−4i