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3 years ago

7

the relationship between the number of $4 lunches you buy with a $100 school lunch card and the money remaining on the card. sta

te whether the graph of each linear relationship is a solid line or a set of unconnected point. Explain your reasoning.

1 answer:

d1i1m1o1n [39]3 years ago

7 0

An unconnected point because you cannot buy a fractional part of lunch

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What is the probability of pulling out a red marble then a blue marble?

statuscvo [17]

Answer:

Step-by-step explanation:

Total marble = 8+5+4 = 19

n(Y) = 8, n(B) = 4 and n(R) = 5

Prob(R) = 5/17

Prob(B) = 4/16 {one marble is pulled out already}

Prob(R and B) = 5/17 × 4/16

= 5/17 × 1/4

= 5/68

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3 years ago

The second term in a geometric sequence is 20. The fourth term in the same sequence is 45/4 or 11.25. What is the common ratio i

kati45 [8]

$\bf \begin{array}{ccll}
n&term&value\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
2&a_2&20\\
3&a_3&20r\\
4&a_4&20rr\\
&&20r^2\\\\
&&\frac{45}{4}
\end{array}\implies \stackrel{4^{th}~term}{20r^2=\cfrac{45}{4}}\implies r^2=\cfrac{45}{80}
\\\\\\
r^2=\stackrel{simplified}{\cfrac{9}{16}}\implies r=\sqrt{\cfrac{9}{16}}\implies r=\cfrac{\sqrt{9}}{\sqrt{16}}\implies r=\cfrac{3}{4}$

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3 years ago

Which expression illustrates the associative property of addition?

4vir4ik [10]

Answer: THIRD OPTION.

Step-by-step explanation:

The Associative property of addition states that when three or more numbers are added, it does not matter how they are grouped, the sum is the same. Then:

$a + (b + c) = (a + b) + c$

Based on this and having the expression $3 + 19- 12$ , we can apply the Associative property as following:

$(3 + 19) - 12 = 3 + (19 - 12)$

Therefore, the expression that illustrates the Associative property of addition is the one shown in the Third option.

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2 years ago

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What is the answer to this

NeX [460]

The answer would be the first choice. When you reflect a shape across the x-axis, the y coordinates of every points/vertices become of the opposite of what they usually were.
For example, the y coordinate in (1, -5) {{-5 being the y coordinate) once reflected upon the x axis would be (1, 5).

On the other hand, if the y coordinate were positive it would become negative.

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3 years ago

Which phrase describes the variable expression m + 5?

Vedmedyk [2.9K]

5m or m(5)

Have a nice day :)

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3 years ago

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