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2 years ago

Which problem could be solved by evaluating the expression 7×(-3)

2 answers:

8 0

C.

3 degree of temperature is decreased every hour.
so total temperature difference in one hour is -3

and in 7 hours, the difference is 7 * -3

Makovka662 [10]2 years ago

4 0

Try c.
7x-3=-21=temperature drop in 7 hrs
☺☺☺☺

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Calculate a vector c in the same direction of the vector a and that has the same length as the vector b

Viktor [21]

For any scalar $t>0$ , $t\vec a$ is a vector pointing in the same direction as $a$ .

To force this vector to have the same length as another vector $\vec b$ , first normalize $t\vec a$ by dividing it by its norm,

$\dfrac{t\vec a}{\|t\vec a\|}=\dfrac{t\vec a}{t\|\vec a\|}=\dfrac{\vec a}{\|\vec a\|}$

then multiply this vector by the norm of $\vec b$ , so that

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To confirm that $\vec c$ has the same length as $\vec b$ :

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2 years ago

In triangle ABC, AC =24, the measure of angle A = 30 degree , and the measure of angle B = 45 degree . Find the area of this tri

andriy [413]

Answer:

142.932

Step-by-step explanation:

given that in triangle ABC, AC =24

Angle A = 30 and Angle B =45

If we draw altitude from C, we get

h = 24sin 30 = 12

Since BC = h (45, 45,90 triangle)

BC=12

By sine formula for triangle

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Area of triangle

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statuscvo [17]

Step-by-step explanation:

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