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3 years ago

How many people were both 20 and Over and failed ? A.9 B.36 C.60 D.15

Mathematics

2 answers:

Valentin [98]3 years ago

7 0

Answer:

Step-by-step explanation:

90 - 30 = 60

60 - 45 = 15

d.15

sweet [91]3 years ago

5 0

Answer: D)15

Step-by-step explanation: Look at the totals first, 90 is the full total so subtract 30 from 90 and you get 60. Now look at the fail column, the only number is 45 so subtract 45 from 60 and you get 15.

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What is f(–3) for f(x) = 2x2 – x + 5? A) 11 B) 17 C) 20 D) 26

nirvana33 [79]

Answer: D

Step-by-step explanation:

f(x) = 2x² - x + 5

f(-3) = 2(-3)² - (-3) + 5

= 2(9) + 3 + 5

= 18 + 3 + 5

= 26

6 0

3 years ago

What is the slope of the line whose equation is 2x+3y = -12?

luda_lava [24]

Answer:

slope = - $\frac{2}{3}$

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Given

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3y = - 2x - 12 ( divide all terms by 3 )

y = - $\frac{2}{3}$ x - 4 ← in slope- intercept form

with slope m = - $\frac{2}{3}$

6 0

2 years ago

Factorise the following :

Free_Kalibri [48]

Answer:

(3x+4b)(a-2y)

Step-by-step explanation:

(3ax-6xy)+(8by-4ab)

3x(a-2y) -4b(-2y+a)

(3x+4b) (a-2y)

4 0

3 years ago

Read 2 more answers

M is the midpoint of AN, A has coordinates

maksim [4K]

Step-by-step explanation:

According to Question , M is the midpoint of AN, A has coordinates (-7,4), and M has coordinates (-4, -1).

Figure :-

$\setlength{\unitlength}{1 cm}\begin{picture}(20,12) \put(4,0.2){\line(0,-1){0.4}}\put(1,0){\line(1,0){6}} \put(3.8,-0.6){$\bf M(-4,-1) $} \put(1,-0.6){$\bf A (-7,4)$} \put(6.8,-0.6){$\bf N(x,y)$} \end{picture}$

Let the coordinates of N be ( x , y )

Now , according to Midpoint Formula , the midpoint of points say A(x , y) and B (x' , y') is given by ,

$\boxed{\blue{ \bf Midpoint =\bigg( \dfrac{x+x'}{2} , \dfrac{y+y'}{2} \bigg) }}$

On using this formula ,

$=> Midpoint = \bigg( \dfrac{x+x'}{2} , \dfrac{y+y'}{2} \bigg) \\ \\ => (-4, 1) = \bigg( \dfrac{x -7 }{2} , \dfrac{y + 4 }{2}\bigg) \\ \\ => -4 = \dfrac{x-7}{2} \\\\ => x - 7 = -8 \\\\ => x = 7 -8 \\\\ \boxed{\red{\sf=> x = -1 }} \\\\ => \dfrac{y+4}{2}=-1 \\\\=> y +4 = -2 \\ \\ y = -4-2 \\\\\boxed{\red{\sf=> y = -6 }}$

8 0

3 years ago

Read 2 more answers

Some friends decide to go to the aquarium together. Each person pays $7.50 to get in. They spend a total of $40 for the shark ex

murzikaleks [220]

Answer:

4 people went to the aquarium

Step-by-step explanation:

7 0

3 years ago