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3 years ago

Pls help im pretty sure its easy i just forgot

Mathematics

2 answers:

dalvyx [7]3 years ago

7 0

the average can be calculated by adding the scores together and then dividing by the number of scores.

we can set up an equation:

let x = test score needed on next test

(72+72+80+x)/4 = 71

multiply both sides by 4

72+72+80+x = 284

add like terms

224+x=284

subtract 224 from both sides

x=60

she will need a 60 for her average to be 71

Nady [450]3 years ago

4 0

She needs to score a 60 to have a average score of 71,

72+72+80+60=284

284/4=71

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Find the slope and y-intercept for the two linear functions.

tankabanditka [31]

Answer: Slope of the line given in the table: m = - 0.25

Y-intercept of the line given in the table: b = -4

Slope of the line given by the equation: m = 1.5

Y-intercept of the line given by the equation: b = 1

Step-by-step explanation: Slope of an equation is an indication of the steepness and direction of a linear graph. It is denoted as m and it can be calculated as:

m = $\frac{y_{2} - y_{1} }{x_{2} - x_{1} }$

Another way of determining the slope is as the form:

y = mx+b

For the table:

As in the table there are only points:

m = $\frac{-3 + 2.5}{-4+6}$

m = - 0.25

For the function:

The function is:

y = 3/2x + 1

m = 3/2

m = 1.5

Y-intercept is where the linear function crosses the y-axis, or when x=0. It can also be represented by the letter b.

For the table:

y = mx + b

According to the table, when y = -2.5, x = -6

-2.5 = - 0.25. (-6) + b

b = -2.5 - 1.5

b = -4

For the function:

y = 1.5x + 1

b = 1

In conclusion:

For the table: m = - 0.25 b = - 4
For the equation: m = 1.5 b = 1

8 0

4 years ago

Read 2 more answers

This hanger is in balance. There are two labeled weights of 4 grams and 12 grams. The three circles each have the same weight.

antoniya [11.8K]

Answer:

8/3

Step-by-step explanation:

6 0

3 years ago

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What is the estimate of 2 1/3 - 2/3

Dmitry_Shevchenko [17]

2 1/3 - 2/3 would equal 1 2/3. Hope this helps!

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3 years ago

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Write the equation using function notation f(x). then find f(0) 2x^2 - 3y = 6

Grace [21]

$\quad \huge \quad \quad \boxed{ \tt \:Answer }$

$\qquad \tt \rightarrow \: f(0) = -2$

____________________________________

$\large \tt Solution \: :$

$\qquad \tt \rightarrow \: 2 {x}^{2} - 3y = 6$

$\qquad \tt \rightarrow \: 3y + 6 = 2 {x}^{2}$

$\qquad \tt \rightarrow \: 3y = 2 {x}^{2} - 6$

$\qquad \tt \rightarrow \: y = \cfrac{2 {x}^{2} - 6 }{3}$

$\qquad \tt \rightarrow \: y = \cfrac{2 {}^{} }{3} {x}^{2} - 2$

[ here, y can be replaced with f(x) because y is a function of x ]

$\qquad \tt \rightarrow \: f(x) = \cfrac{2 {}^{} }{3} {x}^{2} - 2$

$\large\textsf{Find f(0):}$

$\qquad \tt \rightarrow \: f(0) = \cfrac{2 {}^{} }{3} {(0)}^{2} - 2$

$\qquad \tt \rightarrow \: f(0) = 0 - 2$

$\qquad \tt \rightarrow \: f(0) = - 2$

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

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elena-s [515]

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