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ELEN [110]
3 years ago
14

A man looked in his wallet and found he had 3 more $5 bills than $10 dollar bills. He had a total of $75. How many of each kind

of bill did he have?
Mathematics
1 answer:
Neko [114]3 years ago
3 0

Answer:

Four 10s and seven 5s

Step-by-step explanation:

If you start with one 10, you have to have four 5s. After that you add one of each until you reach 75

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For a certain data set the regression equation is y = 2 + 3x. The correlation coefficient between y and x in this data set _____
lozanna [386]

Answer:

C. Must be 1

Step-by-step explanation:

The correlation coefficient of an equation represents the relation between the  two variable ( dependent and independent )

It lies between -1 to 1,

If an equation has strongly positive correlation then the value of correlation coefficient is 1,

If there is no relation then the value of correlation is 0,

If there is strongly negative relation then the value of correlation coefficient is -1,

Here, the equation is,

y = 2 + 3x

Since, the value of y is increasing with increasing the value of x,

We can say that there is strong positive relation between the variables x and y,

Hence, by the above statements,

The correlation coefficient between y and x in this data set must be 1.

Option 'C' is correct.

7 0
3 years ago
Nico is saving money for his college education. He invests some money at 9% and 800 less than that amount at 6%. The investments
vampirchik [111]

Answer:

$1800 at 9% and $1000 at 6%

Step-by-step explanation:

Not needed

5 0
3 years ago
O número 2021 tem resto 5 quando dividido pelo nmr 6, 7, 8, e pelo nmr 9. Quantos múmeros inteiros positivos menores do que 2021
Leokris [45]

336

Step-by-step explanation:

2021-5=2016÷6=336

8 0
2 years ago
2
s2008m [1.1K]
It will be $105 a month
5 0
3 years ago
What is the area of the shaded region?
kolezko [41]

Answer:

110 cm^2

Step-by-step explanation:

The first thing that you need to do is find the area of triangle AFE. The area of a triangle is always base*height/2. So in this case, that would be 10*6 divided by 2, which is 30 cm. Next, you will need to know the area of triangle ECB. Using that same formula, you will get 8*10/2, which is 40 cm. Finally, you will need to find the area of the whole rectangle. The area of a rectangle is always the length times the width. In this case, you would have 10*18, which is 180 cm. To get your final answer, you need to subtract the areas of the unshaded area from the whole area. That would be 180-(30+40), which is 110 cm. I hope this helped!

6 0
2 years ago
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