4 years ago

Find the dot product of v=-7i+4j and w=-6+5j

Mathematics

1 answer:

Anna35 [415]4 years ago

6 0

V•w = (-7i +4j)•(-6i +5j) = (-7)×(-6) +4×5 = 42 +20
v•w = 62

You might be interested in

Jobi is taking his children on a long drive. Jobi is making snack bags to take on the drive using 40 granola bars and 32 apples.

Karolina [17]

40
$40 \times 32$

8 0

4 years ago

Find a quadratic function with the given x-values as the only two REAL zeros. x=-2 and x=8. Please show work! Will mark Brainlie

posledela

f(x) = (x- zero) * (x -zero)

f(x) = (x--2) (x-8)

f(x) = (x+2) (x-8)

if you need it multiplied out

f(x) = x^2 +2x -8x-16

f(x) = x^2 -6x-16

3 0

3 years ago

Find the slope of the line that contains the points named a (o,d),b (d,o)

V125BC [204]

$\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ 0}}\quad ,&{{ d}})\quad 
% (c,d)
&({{ d}}\quad ,&{{ 0}})
\end{array}
\\\\\\
% slope = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{0-d}{d-0}\implies \cfrac{-d}{d}\implies -1$