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Alchen [17]
3 years ago
12

Denny's fruit stall sells oranges for $2 per bag, and he sells pears for $5 per bag. By the end of the day, Denny had made $21.

Put this in standard form.
Mathematics
1 answer:
olga_2 [115]3 years ago
3 0
For this problem, we should assign variables to fruits in order.

x = oranges and y = pears

The cost of each fruit times the number of each fruit sold has to equal a grand total of $21

In standard form, this is written as: 2x + 5y = 21
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Kelvin and Lewie each design surveys in order to determine the number of people who buy food at the mall. Kelvin surveys every o
timurjin [86]

Answer: A.Kelvin’s because he surveyed people leaving an area where food is sold


Step-by-step explanation:

Given: Kelvin and Lewie each design surveys in order to determine the number of people who buy food at the mall.

Kelvin surveys every other person leaving the food area.

Thus, he doesn't know about the people who do not buy food at mall whereas Lewie surveys every fifth person leaving the mall’s main entrance.

Thus, by this systematic random sampling he knows out of how many people the number of people buy food at mall.

Hence, Kelvin’s survey is likely to produce less valid results because he surveyed people leaving an area where food is sold.

6 0
3 years ago
Read 2 more answers
Plz help! anybody. i'll mark brainliest 20 points!!!!
lisabon 2012 [21]

(1)    Snow fall in last week = 3 \frac{1}{2} inches

Snow fall in today= 5 \frac{3}{4} inches

Let us first change mixed fraction to improper fraction.

\begin{aligned}&3 \frac{1}{2}=\frac{7}{2}\\&5 \frac{3}{4}=\frac{23}{4}\end{aligned}

Now, make the denominators same.

3 \frac{1}{2}=\frac{7}{2}=\frac{7 \times 2}{2 \times 2}=\frac{14}{4} ,       5 \frac{3}{4}=\frac{23}{4}

Now, find the difference between 14/4 and 23/4.

\frac{23}{4}-\frac{14}{4}=\frac{9}{4}=2 \frac{1}{4}

So, compared to last week 2 \frac{1}{4} more inches of snow fell today.

(2)    Given three times a number, minus nine, equals six times six, divided by four.

Let a number be X.

3X – 9 = 6 × 6/4

(3)  To solve the equation:

3X – 9 = 6 × 6/4

3X – 9 = 36/4

3X – 9 = 9

3X = 18

X = 6

5 0
3 years ago
How do I calculate this distributive property equation:
azamat
6( 5 + 8 )

6 * 13 = 78

Your answer is 78.

Hope this helped!
6 0
3 years ago
How do I find the area of the shaded blue region?
kogti [31]

That's a 240 degree sector of a 9 inch radius circle.  The whole circle has area πr² and we want 240/360 of it.

A = (240/360) π (9²) = 54 π

Answer: 54 π square inches

That's the exact answer.  An approximation is

169.646 square inches

3 0
3 years ago
How do I find the sum and Express it in simplest form ? (3t^2+6t)+(-9t^2-5t+5)
Leona [35]

-6t²+t+6

1. Let's group terms like, after eliminating the parentheses.

(3t²+6t+1)+(-9t²-5t+5)

3t²+6t+1-9t²-5t+5

3t²-9t² +6t-5t +5+1

-6t²+t+6

This is the simplest and most convenient form since there' s already a coefficient 1 in term "t".

6 0
1 year ago
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