3 years ago

Find the sum x^2-2x-15 and 2x^2+5x-2

Mathematics

1 answer:

WITCHER [35]3 years ago

3 0

Answer:

x^2-2x-15 = (

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What is the electric field strength at a distance of 15 cm from a point charge that has 12

ivann1987 [24]

The formula is E= kQ/ d^2

k is 9x10^9
i changed 15 cm to 0.15 m

=> 9x10^9 x 12 OVER (0.15)^2

the answer is 4.8x10^12 N/C

but this is the electric field.

to find electric field STRENGTH, it’s E= F/q and you did not give a value for the force

8 0

3 years ago

Please help i am on a timer

meriva

Answer:

x^2 = 36

Step-by-step explanation:

logx ( 36) = 2

Rewrite this as an exponential equation

We know that loga(b) =c as a^b =c

x^2 = 36

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3 years ago

Work out 15% of £24 please

mylen [45]

Answer:

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Step-by-step explanation:

24 = 100% ; x = 15%

Let's make it simple

$\frac{x}{24 } = \frac{15}{100} ; x = 24.15/ 100 ; x=3.6$

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2 years ago

the angle of elevation from point c to the top of the cliff is 34°. if point c is 1,000 ft from the base of the cliff, how high

Yanka [14]

Answer:

675 ft (3 s.f.)

Step-by-step explanation:

Please see attached picture for full solution.

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3 years ago

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type the slope intercept equation of the line that passes through the point (1,1)&(7,4) enter fraction in simplest form

9966 [12]

$\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ 1}}\quad ,&{{ 1}})\quad 
% (c,d)
&({{ 7}}\quad ,&{{ 4}})
\end{array}
\\\\\\
% slope = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{4-1}{7-1}\implies \cfrac{3}{6}\implies \cfrac{1}{2}$

$\bf y-{{ y_1}}={{ m}}(x-{{ x_1}})\implies y-1=\cfrac{1}{2}(x-1)\\
\left. \qquad \right. \uparrow\\
\textit{point-slope form}
\\\\\\
y-1=\cfrac{1}{2}x-\cfrac{1}{2}\implies y=\cfrac{1}{2}x-\cfrac{1}{2}+1\implies y=\cfrac{1}{2}x+\cfrac{1}{2}$

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3 years ago