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Mathematics

1 answer:

olga55 [171]3 years ago

8 0

Answer:

Anyone help with this

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Question 1a: Given the function below. find f(-2)<br> f (x) = x2 + 4x - 5<br> E<br> Your answer

oee [108]

Answer: -17

f(-2)= -2^2 + 4(-2) -5
-4 + (-8) -5
-4-8-5= -17

7 0

3 years ago

Which arrow would most likely represent the phase change that involves the same amount of energy as arrow 1?

cestrela7 [59]

Answer:

arrow 4

Step-by-step explanation:

The amount of energy needed in the transformation from liquid to gas is equal to the gas to liquid transition.

Boiling is the mechanism by which a substance passes from the liquid phase to the gaseous form.

Like water diagram in phase:

Evaporisation is a method of phase shift in which the water transitions from a liquid to a gas (water vapour).

Condensation is the process of phase shift in which water transitions from a gas to a liquid, and the vapour becomes a cloud.

3 0

4 years ago

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A 20-foot ladder is leaning against a tree. The bottom of the ladder is 12 feet away from the bottom of the tree. Approximately

arsen [322]

Pythagorean theorem is a^2 + b^2 = c^2. the hypotenuse is always the longest, so lets plug in the values.

a^2 + 12^2 = 20^2
if we simplify, we get a^2 + 144 = 400

then subtract 400-144 = 256
then find the sq. root of 256 = 16.

the answer is 16 feet

3 0

3 years ago

At Lissie's ice cream shop, 3 of the last 10 cones

aksik [14]

Answer:

Step-by-step explanation:

Assuming that the proportion of chocolate topping is constant.

$\frac{3}{10}*170=51$