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3 years ago

How many solutions is x + 5y = 0 and 25y = -5 (13 points for answer) Please help :(

Mathematics

1 answer:

dybincka [34]3 years ago

7 0

Answer:

for x+5y+0 the answer is -5y and for 25y=-5 the answer is -1/5

Step-by-step explanation:

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How many degrees warmer is a temperature of 13°F than a temperature of -19°F?

Nata [24]

It'd be 32 degrees F warmer

13-(-19)
=32

8 0

3 years ago

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What is the volume of a regular pyramid having a base area of 24 inches and height of 6 inches

Anestetic [448]

Answer:

V= 48 in^2

Step-by-step explanation:

Formula

Since the base has a known area, we do not need the full volume formula. This formula is

B is the area of the base and h is the height measured from the top of the pyramid to the base meeting the base at right angles.

Givens

B = 24 in^2

h = 6 in

Solution

V = B * h / 3

V = 24 * 6/3

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2 years ago

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Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil.

oksian1 [2.3K]

Answer:

0.36 = 36% probability that the land has oil and the test predicts it

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

45% chance that the land has oil.

This means that $P(A) = 0.45$

He buys a kit that claims to have an 80% accuracy rate of indicating oil in the soil.

This means that $P(B|A) = 0.8$

What is the probability that the land has oil and the test predicts it?

This is $P(A \cap B)$ . So

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

$P(B \cap A) = P(B|A)*P(A) = 0.8*0.45 = 0.36$

0.36 = 36% probability that the land has oil and the test predicts it

5 0

3 years ago

A right circular cylinder with a radius of 2.3cm and a height of 1.4cm has a total surface area of

likoan [24]

Answer:

i think 6.44

Step-by-step explanation:

first the diameter is 4.6 then multiply the 4.6 with 1.4 and u obtaine 6.44 (note:iam not sure iam still in seven grade)

4 0

3 years ago

PLEASE HELP

shtirl [24]

Step-by-step explanation:

1*-2=-2, -2*-2=4, -2*4=-8, -8*-32=256

8 0

3 years ago