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3 years ago

Someone help me with this ASAP!!!

Mathematics

2 answers:

aliina [53]3 years ago

8 0

2/3
2/3
2/21

Hope it helps!!

faust18 [17]3 years ago

3 0

Answer: The 2/9 should have been simplified to 2/3. Then multiply 1/7 and 2/3 to find the product, 2/21

You have to "simplify" both factors at the same time before moving on to multiplying them.

Step-by-step explanation:

Another way to do this is to multiply straight across 3/7 × 2/9 to get 6/63 then notice that the numerator and denominator are both multiples of 3.

Simplify by dividing numerator and denominator by 3 to get 2/21

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PLEASE HELP!!!!!

Vadim26 [7]

Answer:

Step-by-step explanation:

9x - 1 / 2 + 9/2 x = 0.128886 (43)

2 / 5x - 1b = 4/3 - 1 - 1 = 2x (4)

= x1 + 24 - 3/4 + 8

9/3 - 1 x = /3

6 0

3 years ago

jerry climbed 210 feet in elevation. He then went down 300 feet. What integer represents his total change in elevation

Gala2k [10]

Answer:

210-300=-90

Step-by-step explanation:hope this helps plz mrk me brainliest

3 0

3 years ago

The population of the world was 7.1 billion in 2013, and the observed relative growth rate was 1.1% per year. A) Estimate how lo

VLD [36.1K]

Answer:

A) 63.36 years.

B) 100.42 years.

Step-by-step explanation:

We have been given that the population of the world was 7.1 billion in 2013, and the observed relative growth rate was 1.1% per year.

A) Since we know that population increases exponentially, therefore we will use our given information to form an exponential model for population increase and then we will solve for the time by which our population will be double.

$P(t)=7.1(1.011)^{t}$

$7.1 \times 2=7.1(1.011)^{t}$

$\frac{7.1 \times 2}{7.1} =(1.011)^{t}$

$2 =(1.011)^{t}$

Now let us solve for t using logarithm.

$ln(2) =ln (1.011)^{t}$

$ln(2) =t \cdot ln(1.011)$

$0.6931471805599453 =t \cdot 0.0109399400383344$

$t=\frac{0.6931471805599453}{0.0109399400383344}$

$t=63.3593217267282743049\approx 63.36$

Therefore, it will take 63.36 years the population to be double.

B) Now we will find the number of years it will take the population to be triple of its size.

$7.1 \times 3=7.1(1.011)^{t}$

$\frac{7.1 \times 3}{7.1} =(1.011)^{t}$

$3 =(1.011)^{t}$

Now let us solve for t using logarithm.

$ln(3) =ln (1.011)^{t}$

$ln(3) =t \cdot ln(1.011)$

$1.0986122886681097 =t \cdot 0.0109399400383344$

$t=\frac{1.0986122886681097}{0.0109399400383344}$

$t=100.4221490079915311298\approx 100.42$

Therefore, it will take 100.42 years the population to triple of its size.

6 0

3 years ago

My friend aliva said she want pie.but,it is 8 ft wide and 8 ft wide coast 199$what pie she get for less money 5ft 20$ 2ft 4$ 1ft

alexdok [17]

She could get C. 1ft $00.9

Hope that helps!

6 0

3 years ago

Read 2 more answers

Simplify the expression. 7x2 + 3 - 5(x2 - 4) 2x2-17 2x2-1 2x2 + 23 25x2

Blizzard [7]

Answer:

1. 14+3-5(-2)= 17+10=27

2. 14-17= -3

3. 4-1=3

4. 4+23=27

5. 50

3 0

3 years ago