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4 years ago

Annnnnnssssswerrrrr pleaseeeee

Mathematics

1 answer:

Sedbober [7]4 years ago

3 0

The answer is -6.

Substitute -1 for x in the function.
12/4(-1) +2
12/-4+2
12/-2
-6

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I need help! Please help me

insens350 [35]

Answer:

x = 3.6

Step-by-step explanation:

By the Postulate of intersecting chords inside a circle.

$x \times 5 = 3 \times 6 \\ 5x = 18 \\ x = \frac{18}{5} \\ x = 3.6 \\$

5 0

4 years ago

What’s the slope of these points (-8,3) and (-8,2)

m_a_m_a [10]

Answer:

donkeey kongy

Step-by-step explanation:

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3 years ago

Read 2 more answers

What is (-47/10)-(53/10) is it -3/5 or -10 the calculator says -10 I say -3/5

Rainbow [258]

$-\frac{47}{10}-\frac{53}{10}=\\
-\frac{100}{10}=\\
-10$

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4 years ago

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rusak2 [61]

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3 0

3 years ago

Two sisters like to compete on their bike rides. Tamara can go 4 mph faster than her sister, Samantha. If it takes Samantha 1 ho

Triss [41]

Answer:

16 mph

Step-by-step explanation:

You should first form equations related to this information

Given,Tamara can go 4 mph faster than her sister, Samantha

Lets take speed to ride a bike for Samantha to be= x mph

The speed to ride a bike for Tamara will be= x+4 mph

To cover a distance of 80 miles, Samantha takes 1 hour longer than Tamara

Introduce the formula for time; time=distance/speed=D/S where D is distance in miles and S is speed in miles per hour

Here time Samantha takes to cover a distance of 80 miles is 1 hour more than that taken by Tamara, hence

Time taken by Samantha

$=\frac{80}{x}$

Time taken by Tamara

$=\frac{80}{4+x}$

Equation for difference in time

$=\frac{80}{x} -\frac{80}{4+x} =1$

Solve the equation for difference in time to get value of x which is samantha speed

$=\frac{80}{x} -\frac{80}{x+4} =1\\\\\\=80(4+x)-80(x)=x(4+x)\\\\\\=320+80x-80x=4x+x^2\\\\\\=x^2+4x-320=0$

Solve quadratic equation by the quadratic formula where a=1,b=4 and c=-320

x=(-b±√b²-4ac)÷2a

x=(-4±√4²-4×1×-320)÷2×1

$x=\frac{-4+/-\sqrt{4^2-4*1*-320} }{2} \\\\\\x=(-4+/-\sqrt{1296} )/2\\\\\\x=\frac{-4+36}{2} =\frac{32}{2} =16$

Samantha speed is 16 mph

6 0

3 years ago