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krek1111 [17]
2 years ago
8

Please help I need help ASAP

Mathematics
1 answer:
Inessa [10]2 years ago
6 0

Answer:

a 2.68

b 2.01

Step-by-step explanation:

1.34/2 =( 0.67 (F) )

(F)*4 = A

(F)*3 = B

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Factor completely. 640-10x^2
Oxana [17]

Answer:

10 (8-x)(8+x)

Step-by-step explanation:

640-10x^2

Factor out 10

10 (64 - x^2)

Notice that inside the parentheses is the difference of squares

10 ( 8^2 - x^2)   and a^2 - b^2 = (a-b) (a+b)

10 (8-x)(8+x)

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2 years ago
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Using the following production tally, determine how many total mousetraps were produced during a shift: Quantity per package: 60
timofeeve [1]
The total number of packages completed was 41 and with 60 moustraps per package so 41 x 60 = 2460. Of these, 52 traps were from the previous shift and 34 were rejects so 2460-52-34 = 2374 produced + 24 in the last unsealed package = 2374 +24 = 2398.
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2 years ago
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Which of the following is equal to the rational expression when x ≠ 4 or -9
Bad White [126]

Answer:

D

Step-by-step explanation:

Given

\frac{(x-4)(x+11)}{(x+9)(x-4)} ← cancel the factor (x - 4) on the numerator and denominator

= \frac{x+11}{x+9} → D

8 0
2 years ago
A conductor is mapping a trip and records the distance the train travels over certain time intervals.
leonid [27]
In half an hour the trains travels 22.5 miles
6 0
1 year ago
A scientist running an experiment starts with 100 bacteria cells. These bacteria double their population every 15 hours. Find ho
IRISSAK [1]
<h2>Hello!</h2>

The answer is: 23.77 hours

<h2>Why?</h2>

Total(t)=Start*2^\frac{t}{15}

Where:

Total(t) is equal to the amount for a determined time (in hours)

<em>Start</em> is the original amount

<em>t </em>is the time in hours.

For example, it's known from the statement that the bacteria double their population every 15 hours, so it can be written like this:

Total(15)=100*2^\frac{15}{15}=100*2^{1}=100*2=200

To calculate how long it takes for the bacteria cells to increase to 300, we should do the following calculation:

300=100*2^{\frac{t}{15} } } \\\frac{300}{100}=2^{\frac{t}{15} } }\\log(3)=log(2^{\frac{t}{15} })\\\\\\log(3)=\frac{t}{15}*log2\\t=\frac{log(3)}{log(2)} *15=23.77

So, to know if we are right, let's replace 23.77 h in the equation:

Total(t)=100*2^\frac{23.77}{15}=299.94

and 299.94≅300

Have a nice day!

8 0
2 years ago
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