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2 years ago

PLS HELP ASAP THANKS ILL GIVE BRAINLKEST PLS THANKS

Mathematics

1 answer:

TEA [102]2 years ago

8 0

Answer:

answer c

Step-by-step explanation:

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When a class took a math test, 15% of the class failed, 25% made some mistakes (but didn’t fail), and 24 students got perfect sc

mart [117]

Answer:

There are 40 students in the class.

Step-by-step explanation:

We are given the following in the question:

Percentage of class that failed = 15%

Percentage of class that made mistakes but did not fail = 25%

Number of students that got perfect score = 24

Percentage of students that got perfect score =

$100\%-\text{Percentage of class that failed}-\text{Percentage of class that made mistakes but did not fail}\\= 100\%-15\%-25\%\\= 60\%$

Let x be the total number of students in the class.

Then, we can write:

$60\% \text{ of } x = 24\\60\% \times x = 24\\\\\displaystyle\frac{60}{100}\times x = 24\\\\x = 24\times \frac{100}{60}\\\\x = 40$

Thus, there are 40 students in the class.

5 0

3 years ago

Read 2 more answers

(4x^3 - 5x^2 + 3) - (6x^3 + 2x^2 - x) Which of the following expressions is equivalent to the expression above?

weqwewe [10]

Answer:

Step-by-step explanation

Factoring: 2x3-5x2+7x-6

Thoughtfully split the expression at hand into groups, each group having two terms :

Group 1: 7x-6

Group 2: 2x3-5x2

so its c

Pull out from each group separately :

Group 1: (7x-6) • (1)

Group 2: (2x-5) • (x2)

Bad news !! Factoring by pulling out fails :

The groups have no common factor and can not be added up to form a multiplication.

6 0

3 years ago

Plz help me this is to much

Natali5045456 [20]

4x10=40
1/2 x 3 x 6= 9
9x40=360

5 0

3 years ago

Where does the point (6,2) lie on a circle centered at (7,8) with a radius of 6

olya-2409 [2.1K]

Answer:

<em>The point lies barely outside of the circle</em>

Step-by-step explanation:

<u>Equation of a Circle</u>

Given its center (h,k) and radius r, the equation of a circle is given by

$(x-h)^2+(y-k)^2=r^2$

The circle given in the question is centered at (7,8) and has a radius of 6, thus its equation is

$(x-7)^2+(y-8)^2=6^2$

$(x-7)^2+(y-8)^2=36$

To find out if a point (a,b) is outside or inside the circle area, the following conditions apply.

if $(a-7)^2+(b-8)^2>36$ then the point lies outside of the circle area

if $(a-7)^2+(b-8)^2$ then the point lies inside of the circle area

Let's use the point as given (6,2)

$(6-7)^2+(2-8)^2=1+36=37$

Thus the point lies barely outside of the circle

5 0

3 years ago

write the point-slope form of the equation of the line through the given points through (0,-1) and (3,-3)

love history [14]

$\text{Given that,}\\\\(x_1,y_1) = (0,-1) ~ \text{and}~ (x_2, y_2) = (3,-3)\\\\\text{Slope, m}= \dfrac{y_2 -y_1}{x_2 -x_1} = \dfrac{-3+1}{3-0} = -\dfrac 23\\\\\\\text{Point slope - form}\\\\y-y_1 = m(x-x_1)\\\\\implies y - (-1) = -\dfrac 23 (x -0)\\\\\implies y +1 = -\dfrac 23 x$

8 0

2 years ago