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k0ka [10]
3 years ago
14

Help i need answers for these problems pls

Mathematics
1 answer:
motikmotik3 years ago
4 0

use the pythagorean theorem

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A sink has two faucets: one for hot water and one for cold water. The sink can be filled by a cold water faucet in 3 minutes. If
iragen [17]

Answer: 6\ minutes

Step-by-step explanation:

You can use the following formula:

\frac{T}{A}+\frac{T}{B}=1

You can say that "T" is the time (in minutes) for both faucets working together, "A" is the time (in minutes) for cold water faucet working alone and "B" is the time (in minutes) for hot water faucet working alone.

Based on the data given in the exercise, you can identify that:

T=2\\A=3

Therefore, substituting these values into the formula and solving for "B", you get that this is:

\frac{2}{3}+\frac{2}{B}=1\\\\\frac{2}{B}=1-\frac{2}{3}\\\\\frac{2}{B}=\frac{1}{3}\\\\2=\frac{1}{3}B\\\\2*3=B\\\\B=6

3 0
3 years ago
Mrs.Isoceles has graded 20% of her 150 students papers how many papers does she still need to grade
Daniel [21]
The answer is 30. you can find the unit rate but the calculator was invented a long time ago so i used that ;)
3 0
3 years ago
Read 2 more answers
For each of the sequences below, enter either diverges if the sequence diverges, or the limit of the sequence if the sequence co
Tanzania [10]

Answer:

As n tends to positive infinity, we have that,

A. 5/n + n/5 ---- converges

B. 5^-n. -----------converges

C. Sin n/5n------ converges

D. 5n + 5/n ------diverges

Step-by-step explanation:

5 0
3 years ago
RST= XYZ. If RT = 10, XY = 18, and YZ = 12, what is XZ?
Jobisdone [24]

Answer:

8

Step-by-step explanation:

RT=10 it is on number A

XY=18 it is on number B

YZ=12 it is on number C

So, I think that no D 8 is in last so that is the answer.

5 0
3 years ago
Read 2 more answers
The sum of two numbers is 70.<br> One number is 10 more the twice the other number.
GalinKa [24]

Answer:

20 and 50

Step-by-step explanation:

x + y = 70

y = 2x + 10

Use the substitution method:

y = 70 - x

y = 2x + 10

70 - x = 2x + 10

3x = 60

x = 20

x + y = 70

20 + y = 70

y = 50

<u>x = 20</u>

<u>y = 50</u>

<u />

4 0
3 years ago
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