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3 years ago

Write a real world problem you could answer by solving the equation 8x + 60 = 300

1 answer:

6 0

You need to make $300 for a new computer. You have $60 already and you can earn $8 for every lawn that you mow. How many lawns do you need to mow to earn at least $300?

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I am between 8 o clock in the morning and 3:00 in the afternoon .My number of minutes is odd i am more than half an hour away fr

Svetach [21]

Answer:

1:00 PM

Step-by-step explanation:

According to the conditions given in the question, i confirm that the time time asked here is 1:00 PM.

at 1:00 PM, its 5 minutes (odd), clearly, more than half an hour away from the next o clock. It is closer to 5 PM than 5 AM.

8 0

4 years ago

The sum of two consecutive odd numbers is 64. Name the numbers.

Marta_Voda [28]

Answer:

31 and 33

Step-by-step explanation:

Odd numbers are apart by 2: 1, 3, 5, 7, for example.

1. x + (x+2) = 64

2. 2x + 2 = 64

3. x = 31

4. 31 + (31 + 2) = 64

5 0

3 years ago

Taking a test i don’t know anything about please help

PilotLPTM [1.2K]

Answer:

See below for answers and explanations

Step-by-step explanation:

Problem 4:

The line of regression is $\hat y = a+bx$ where:

$a=\overline y-b \overline x$

$b=\frac{r*s_y}{s_x}$

We are given that $\overline y=75$ , $s_y=8$ , $\overline x=280$ , $s_x=30$ , and $r=0.60$ , therefore our slope, $b$ , is:

$b=\frac{r*s_y}{s_x}$

$b=\frac{(0.60)(8)}{30}$

$b=0.16$

Therefore, the slope of the regression line is 0.16, which can be used along with the values of $\overline y$ and $\overline x$ to find the constant $a$ :

$a=\overline y-b \overline x$

$a=75-(0.16)(280)$

$a=30.2$

This means our final regression line is $\hat y = 30.2 + 0.16x$

Problem 5:

The slope, $b=0.16$ , means that for every 1 point earned for a student's pre-exam total, their final exam score will increase by 0.16 points for each point they earned on the pre-exam.

Problem 6:

The y-intercept (or constant), $a=30.2$ , means that if a student's pre-exam total were 0, then they would expect to get a 30.2 on the final exam.

Problem 7:

$R^{2}=(0.60)^{2}=0.36=36\%$

Problem 8:

The fraction of variability (aka. coefficient of determination), $R^2$ , means that a certain proportion (or percentage) of the variance in the response variable can be explained by the explanatory variable. In context, this means that 36% of the variance in final exam scores can be explained by the pre-exam scores.

6 0

3 years ago

A box contains

Nezavi [6.7K]

1/2 & 3/10 .. in simplest form

7 0

4 years ago

Describe how to use a tens fact to find the difference for 15-8

lutik1710 [3]

you can round 15 to 20 and 8 and to 10

8 0

3 years ago

Read 2 more answers