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3 years ago

Solve for x. 2x – 3 + 6x = 21 x = [?]

Mathematics

2 answers:

Alex3 years ago

8 0

Answer:

X=3

Step-by-step explanation:

Hope this helps

NISA [10]3 years ago

4 0

Step-by-step explanation:

X=3

The work you should show is in the pic step by step

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Help me pls with this complete a and B I will give you brainliest if answer is correct:-)

Ganezh [65]

Answer:

a) Multiplied by 1.04

b)160(1.06)=169.6

Step-by-step explanation:

Its increasing so (1+4%) will be what it multiplied to.

Hope it helps u

160(1+6%)=169.6

7 0

4 years ago

Is 71 qt greater than 285 c ?

Luda [366]

Well I think they are approximately the same I'm not exactly sure but they are close to each other

3 0

3 years ago

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Use differentiation method to find the slope of the tangent hence the

dezoksy [38]

Answer:

The equation of the tangent at x=-6 is $y=-\frac{3}{4}x-\frac{15}{2}$

Step-by-step explanation:

The equation of a circle with center (h,k) with radius r units is given by:

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

The given circle has center (-3,1) and radius 5 units.

We substitute the center and the radius into the equation to get;

$(x--3)^2+(y-1)^2=5^2$

$(x+3)^2+(y-1)^2=25$

To find the slope, we differentiate implicitly to get:

$2(x+3)+2(y-1)\fra{dy}{dx}=0$

$2(y-1)\frac{dy}{dx}=-2(x+3)$

$\frac{dy}{dx}=-\frac{x+3}{y-1}$

When x=-6;we have $(-6+3)^2+(y-1)^2=25$

$\implies 9+(y-1)^2=25$

$\implies (y-1)^2=25-9$

$\implies (y-1)^2=16$

$\implies y-1=\pm \sqrt{16}$

$\implies y-1=\pm4$

$\implies y=1\pm4$

$y=-3$ or $y=5$

From the graph the reuired point is (-6,-3).

We substitute this point to find the slope;

$\frac{dy}{dx}=-\frac{-6+3}{-3-1}$

$\frac{dy}{dx}=-\frac{3}{4}$

The equation is given by $y-y_1=m(x-x_1)$ .

We plug in the slope and the point to get:

$y--3=-\frac{3}{4}(x--6)$

$y=-\frac{3}{4}(x+6)-3$

$y=-\frac{3}{4}x-\frac{9}{2}-3$

$y=-\frac{3}{4}x-\frac{15}{2}$

5 0

4 years ago

felicity babysat 2 hours each night for 10 nights.she earned a total of $180 babysitting.felicity wants to calculate her hourly

snow_tiger [21]

So, 2 hours times 10 this is 20 hours. $180 divided by 20. This is 9.
Her hourly rate is $9.
Hope this helps :)

5 0

3 years ago

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Sousa Middle School's marching band practice is 60 minutes long. They spend 40% of the time practicing their half-time performan

Inga [223]

Answer:

24 minutes

Step-by-step explanation:

40% of 60

5 0

3 years ago

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