Select all of the following expressions that are true. Explain. 87 × 910 = 7270 ; I multiplied 8 and 9 to get the numerator, and I multiplied 7 and 10 to get the denominator. 710 × 98 = 1618 ; I added 7 and 9 to get the numerator, and I added 10 and 8 to get the denominator. 107 × 98 = 9015 ; I multiplied 10 and 9 to get the numerator, and I added 7 and 8 to get the denominator. 79 × 810 = 5690 ; I multiplied 7 and 8 to get the numerator, and I multiplied 9 and 10 to get the denominator. 810 × 910 = 7220 ; I multiplied 8 and 9 to get the numerator, and I added 10 and 10 to get the denominator.

Answers

Answer 1

The only expression that is true is 8/7 × 9/10 = 72/70.

What is expression with example?

In mathematics, an expression is a combination of symbols, numbers, and operators (such as +, −, ×, ÷) that represents a mathematical quantity or relationship. Expressions can be simple or complex, and they can involve variables, constants, and functions.

For example, "2 + 3" is an expression that represents the sum of 2 and 3. Another example is "4x − 7", which represents the result of subtracting 7 from the product of 4 and a variable x. In this case, x is a variable, and its value can vary depending on the context in which the expression is used.

To explain, when multiplying fractions, you multiply the numerators together and the denominators together. In this case, 8/7 × 9/10 becomes (8 × 9)/(7 × 10) which simplifies to 72/70 by dividing both the numerator and denominator by their greatest common factor, which is 2 in this case. The other expressions are not true because the methods used to arrive at the numerators and denominators are incorrect. For example, in 7/10 × 9/8 = 16/18, the numerator should be 63, not 16, and the denominator should be 80, not 18. Similarly, in 10/7 × 9/8 = 90/15, the denominator should be 56, not 15.

Therefore, 8/7 × 9/10 = 72/70 expression that is true.

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Related Questions

How does glia function within the nervous system.

Answers

Answer:

Glia regulates synapse formation and pruning,

Explanation:

After neurogenesis, neuronal migration, and axon guidance are complete, prospective partner neurons begin to make synaptic connections.

In Virginia is it illegal to sell marijuana?

Answers

you can grow your own but you can not sell it in virginina

Answer:

Selling marijuana in Virginia remains a felony, with punishments ranging from one year in prison to life depending on the amount sold.

Explanation:


which of the following is most unreliable in establishing time of death?
A. Rigor mortis
B. putrefaction
C. postmortem lividity
D. muscular viscidity

Answers

Answer:

D

Explanation:

D. Muscular viscidity is the most unreliable in establishing the time of death.

Muscular viscidity, also known as rigor caloris, is the stiffening of muscles due to the coagulation of muscle proteins after death. Unlike rigor mortis, which sets in within a few hours after death and disappears after a day or two, muscular viscidity can persist for several days and is influenced by factors such as temperature and the type of muscle. Therefore, it is not considered a reliable indicator of the time of death.

On the other hand, rigor mortis, postmortem lividity, and putrefaction are all more reliable indicators of the time of death. Rigor mortis begins to set in a few hours after death and disappears within 24-36 hours. Postmortem lividity, which is the pooling of blood in the lowest parts of the body after death, becomes fixed after 8-12 hours and can help establish the position of the body at the time of death. Putrefaction, which is the breakdown of tissues by bacteria after death, follows a predictable pattern and can provide clues as to how long the person has been dead

Pancreatic pseudocysts are localized collections of pancreatic secretion in a cystic structure. The preferred operative therapy is internal drainage by:
a. cystojejunostomy
b. cystogastrostomy
c. cystoduodenostomy
d. all of the above

Answers

Answer:

B

Explanation:

because its very strong

Explanation:

Internal drainage by cystogastrostomy, cystojejunostomy, or cystoduodenostomy is a preferred operative therapy for pancreatic pseudocysts. Therefore, the correct answer is d. all of the above.

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