3 years ago

In 45 years, Gabriela will be 4 times as old as she is now. How old is she right now

Mathematics

1 answer:

11111nata11111 [884]3 years ago

7 0

Gabriela is 15 years old right now

(15 and 3 months to be exact)

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How do u divide fractions

Lelu [443]

Keep, change, flip

Example: 3/4 divided by 6/8

Step 1: keep 3/4

Step two: change the division sign to a multiplication sign

Step 3: flip 6/8 and make it 8/6

Step 4: multiply it, then that’s your answer to the division problem

8 0

3 years ago

A 46 gram sample of a substance that is used to sterilize surgical instruments has a k-value of 0.1374. Find the substance's hal

mars1129 [50]

Answer:

$t=5.0days$

Step-by-step explanation:

Using the formula for the exponential decay that is $N=N_{0}e^{-kt}$ , we have N= $\frac{1}{2}{\times}46=23$ , $N_{0}=46$ and k=0.1374.

Thus, $N=N_{0}e^{-kt}$ becomes

$23=46{\times}e^{-0.1374t}$

$\frac{23}{46}=e^{-0.1374t}$

$\frac{1}{2}=e^{-0.1374t}$

Taking log on both sides, we get

$ln(\frac{1}{2})={-0.1374t}$

$t=\frac{ln\frac{1}{2}}{-0.1}$

$t=\frac{-0.6931}{-0.1374}$

$t=5.0days$

4 0

3 years ago

There are 12 students who wish to enroll in a particular course. there are only five seats left in the classroom. how many diffe

siniylev [52]

792 is the answer

(12*11*10*9*8)/5!=792

5 0

3 years ago

Which of the following is the correct answer when you factor: −2x4+10x5+2x6?

qaws [65]

Answer:

Step-by-step explanation:

−2x4+10x5+2x6

5 0

3 years ago

Point A is at (-7,5) and point is at (5,-1).

olga55 [171]

Answer:

B = (3, 5)

Step-by-step explanation:

Point A is at (-7,5) and point C is at (5,-1). Find the coordinates of point B on AC such that AB is 5 times longer than BC. Then, B split AC in a 5:1 ratio.

rise = yC - yA = -1 - 5 = -6

run = xC - xA = 5 - (-7) = 12

c = 5/(5+1) = 5/6

B = (xA + c*run, yA + c*rise)

B = (-7 + 5/6*12, 5 + 5/6*-6)

B = (3, 5)

8 0

2 years ago

Read 2 more answers