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SCORPION-xisa [38]
2 years ago
11

What does 3 1/2 + 1 1/4 equal in mixed numbers?

Mathematics
1 answer:
andreev551 [17]2 years ago
6 0

Answer:

4 3/4

Step-by-step explanation:

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Solve. 4+ x/7 = 2. plss...​
galina1969 [7]

Answer:

-21

Step-by-step explanation:

4+1-21/7 =2

8 0
3 years ago
Read 2 more answers
(04.05 LC)
Komok [63]

correct answer is option d.

<u>Step-by-step explanation:</u>

Here, we have The following expression to check Which of the following is a polynomial with roots: −square root of 3 , square root of 3, and 2 :

<u>a. x3 + 3x2 − 5x − 15 </u>

For -\sqrt{3} ,  x^{3} + 3x^{2} -5x -15  ⇒ (-\sqrt{3}) ^{3} + 3(-\sqrt{3} )^{2} -5(-\sqrt{3} ) -15 \neq  0 . So, this isn't the one. We move on further!

<u>b. x3 + 2x2 − 3x − 6 </u>

For -\sqrt{3} ,  x^{3} + 2x^{2} -3x -6  ⇒ (-\sqrt{3}) ^{3} + 2(-\sqrt{3} )^{2} -3(-\sqrt{3} ) -6  = 0 .

For \sqrt{3} ,  x^{3} + 2x^{2} -3x -6  ⇒ (\sqrt{3}) ^{3} + 2(\sqrt{3} )^{2} -3(\sqrt{3} ) -6 = 0.

For 2 ,  x^{3} + 2x^{2} -3x -6  ⇒ (2) ^{3} + 2(2)^{2} -3(2 ) -6\neq 0 . So, this isn't the one. We move on further!

<u>c. x3 − 3x2 − 5x + 15 </u>

For -\sqrt{3} ,  x^{3}- 3x^{2} -5x -15  ⇒ (-\sqrt{3}) ^{3}- 3(-\sqrt{3} )^{2} -5(-\sqrt{3} ) -15 \neq  0 . So, this isn't the one. We move on further!

<u>d. x3 − 2x2 − 3x + 6</u>

For -\sqrt{3} ,  x^{3} - 2x^{2} -3x +6  ⇒ (-\sqrt{3}) ^{3} - 2(-\sqrt{3} )^{2} -3(-\sqrt{3} ) +6  = 0 .

For \sqrt{3} ,  x^{3} - 2x^{2} -3x +6  ⇒ (\sqrt{3}) ^{3} -2(\sqrt{3} )^{2} -3(\sqrt{3} ) +6 = 0.

For 2 ,  x^{3} - 2x^{2} -3x +6  ⇒ (2) ^{3} - 2(2)^{2} -3(2 ) +6 = 0.

Therefore, correct answer is option d.

6 0
3 years ago
I need help with 1 and 3 and 5 (PLS HELP) I’m begging I need help
xz_007 [3.2K]

there is no question attached

3 0
3 years ago
What is 9 + t/12 = -3
klemol [59]
9 + t/12 = -3

t/12 = -12

t = -144

hope this helps
3 0
3 years ago
Read 2 more answers
Researchers recorded that a certain bacteria population declined from 120,000 to 200 in 36 hours. At this rate of decay, how man
quester [9]

Answer: There will 486 bacteria in 31 hours.

Step-by-step explanation:

The population decay in bacteria is exponential.

Exponential function : y=Ab^x, where A = initial population, b multiplication decay factor, t= time:

As per given:

Initial population: A=120,000

After 36 hours, population = 120000(b^{36})=200

Divide both sides by 120,000 we get

b^{36}= 0.00167

Taking natural log on both sides , we get

36\ln b=\ln 0.00167\\\\\Rightarrow\ b=e^{\left(\frac{\ln0.00167}{36}\right)}=0.83724629\approx0.8372

At x= 31,

y=120000(0.8372)^{31}=120000\times0.00405234\approx486

Hence, there will 486 bacteria in 31 hours.

4 0
4 years ago
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