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3 years ago

At the market, 8 batteries cost $10. How much do 6 batteries cost? CA

Mathematics

2 answers:

timama [110]3 years ago

7 0

Answer:

$7.50

Step-by-step explanation:

8*3/4=6

10*3/4=7.5

Please mark as Brainliest! :)

Have a nice day.

solmaris [256]3 years ago

3 0

Answer:

x = 7.5 or $7.50

Step-by-step explanation:

It is a Direct way of answer:-

8/10=6/x ( cross multiplication)

8x(x) = 10x6

8x = 60

x = 60/8

x = 7.5//

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2 years ago

If the discriminant of an equation is positive, which of the following is true of the equation?

Bumek [7]

D>0 that means it has two real solutions (unequal).
It can have one solution only if D=0 and complex solutions only if D<0. 

D means discriminant

Answer: B it has two real solutions

hope this helps :)

3 0

3 years ago

Write y=-3x^2-24x-46 in vertex form.

earnstyle [38]

The answer is the second choice.

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3 years ago

Suppose that NOP is isosceles with base.

NemiM [27]

Step-by-step explanation:

In isocseles triangle, base angles are equal :

base angles are angle N and angle P:

angle N=angle P

3x+17=4x+2

4x-3x=17-2

x=15

For angle N:

subtitute x in angle N

=3(15)+17

=45+17

=62

For angle P:

subtitute x in angle P:

=4(15)+2

=60+2

=62

For angle O:

sum of all angles in a triangle is 180.

angle N +angle P+angle O=180

62+62+angle O=180

angle O=180-62-62

angle O=56

Note: if you have any question let me know about it. thanks

4 0

2 years ago

Find the values of b such that the function has the given maximum value.

gizmo_the_mogwai [7]

So, the equation has a leading term with a negative coefficient, and is a quadratic, meaning is a parabola opening downwards, so it goes up and up and up and then makes a U-turn then down down, so it has a maximum point, that is, at the vertex point

so.. where the dickens is the vertex at?
we're asked to make the vertex with a y-coordinate of 104, so the maximum value is 104

well
$\bf y = {{ a}}x^2{{ +b}}x{{ +c}}\qquad 
\left(-\cfrac{{{ b}}}{2{{ a}}}\quad ,\quad {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}\right)\\\\
-----------------------------\\\\
\textit{so we want }\implies {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}=104
\\\\
\textit{let's take a peek at your equation}\quad 
\begin{array}{ccccllll}
f(x)=&-x^2&+bx&-17\\
f(x)=&-1x^2&+bx&-17\\
&\uparrow &\uparrow &\uparrow \\
&a&b&c
\end{array}
\\\\
thus
\\\\
(-17)=\cfrac{b^2}{4(-1)}=104$

solve for "b"

5 0

3 years ago