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3 years ago

Can anyone help me answer 4 and 5? Plzz

Mathematics

1 answer:

GaryK [48]3 years ago

3 0

#4

Examine the relationship between y and x, waiting until later to examine the y-intercept. For example: If we look at B, and mult. x = 2 by 0.55, we get 1.10, which is not even close to the y = 6.5 given in the table. If, however, we mult. 2 by 3.55, we get 7.10, which is not the same as the y = 6.5 given in the table, but is much closer than 1.10.

Also note that all y values in the table are positive, so a negative slope would be inappropriate. That eliminates choices A and D.

Focus now on the remaining choices B and C. Again, let x= 2 and determine the associated y value. Which y value is closer to the table's 6.5?

B: 0.55(2) + 3.55 = 4.65 (relatively far away from the table's 6.5)

C: 3.55(2) - 0.55 = 6.55 (very close to the table's 6.5)

C is the correct answer.

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3 years ago

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There are 80 major sources of pollen in state A. These pollen sources are categorized as grasses, weeds, and trees. If the numb

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Answer:

Grasses: 12

Weeds: 29

Trees: 39

Step-by-step explanation:

Let G, W and T represent number of grasses, weeds, and trees that are major pollen sources.

We have been given that there are 80 major sources of pollen in state A. We can represent this information in an equation as:

$G+W+T=80...(1)$

We are told that the number of weeds is 7 less than thrice the number of grasses. We can represent this information in an equation as:

$W=3G-7...(2)$

We are also told that the number of trees is 3 more than thrice the number of grasses. We can represent this information in an equation as:

$T=3G+3...(3)$

Upon substituting equation (2) and equation (3) in equation (1), we will get:

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$G=12$

Therefore, there are 12 grasses that are major pollen sources.

Number of weeds that are major pollen sources:

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Therefore, there are 39 trees that are major pollen sources.

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3 years ago

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Answer:

$=2(2x-5)(x+1)$

Step-by-step explanation:

So we have the trinomial:

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Now, factor within the parentheses.

To do so, we want to find two numbers. When multiplied, these two numbers must equal (a)(c) and when added, they must equal b

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-5 and 2 works. Therefore:

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Replace -3x with 2x and -5x:

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Factor out a 2x for the first two terms. And factor out a negative 5 for the remaining two:

$=2(2x(x+1)-5(x+1))$

Grouping:

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