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1 year ago

Pls help me answer these 2 questions

Mathematics

2 answers:

marishachu [46]1 year ago

7 0

Answer:

4+(-3) = 1

-6-2= -8

Step-by-step explanation:

Same sign add

Different sign subtract

Keep the sign of the bigger number

Ghella [55]1 year ago

3 0

Answer:

Step-by-step explanation:

A = 1 plus negatives out be minusing positive

B= -8 minus negatives would be nega tive plus negatives

rules

If you love to love your a lover

if you hate to hate your a lover

if you love to have ur a hater

if you hate to love ur a hater

this all relates to positive and negative addition and subtraction

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Liula [17]

The answer to this would be false

5 0

3 years ago

A vector u has a magnitude of 15 and a direction of 0 degrees. A vector v has a magnitude of 9 and a direction of 35 degrees. Fi

umka2103 [35]

Answer:

$\displaystyle \alpha \simeq 13^o$

$\displaystyle \left | \vec{u}+\bar{v} \right |\simeq 23$

Step-by-step explanation:

<u>Sum Of Vectors</u>

Given

$\displaystyle \vec{u}=, \vec{v}=$

the sum of both is

$\displaystyle \vec{u}+\vec{u}=$

Given a vector

$\displaystyle \vec{x}=$

The magnitude of \vec x is

$\displaystyle \left | \vec{x} \right |=\sqrt{m^2+n^2}$

And the angle is forms with the positive x-axis is

$\displaystyle tan\alpha =\frac{n}{m}$

We have

$\displaystyle \vec{u}=$

Also

$\displaystyle \vec{v}=$

$\displaystyle \vec{v}=< 7.372,5.162>$

The sum of both vectors is

$\displaystyle \vec{u}+\vec{v}=$

The magnitude of the sum is

$\displaystyle \left | \vec{u}+\vec{v} \right |=\sqrt{22.732^2+5.162^2}=22.96$

We compute the angle (direction)

$\displaystyle tan\alpha =\frac{5.162}{22.732}=0.227$

$\displaystyle \alpha =12.79^o$

Rounding to the nearest integer

$\displaystyle \alpha \simeq 13^o$

Rounding the magnitude

$\displaystyle \left | \vec{u}+\bar{v} \right |\simeq 23$

5 0

3 years ago

Sam is building a fence around his circular garden with a diameter of 8 ft. How long is the fence?

r-ruslan [8.4K]

Answer:

25.13ft

Step-by-step explanation:

The length of the fence will be the circumference.

$C=2*pi*r=2*pi*8/2=8pi=25.13ft$

3 0

3 years ago

Simplify the expression -3/(-2/5)

Annette [7]

-3/(-2/5) = -3 * (5/-2)=15/2=7.5

5 0

3 years ago

Read 2 more answers

Does the triangle with the side lengths of 6ft, 7ft, and 8 ft form a right triangle

Zigmanuir [339]

Answer:

No.

Step-by-step explanation:

When the side lengths are consecutive integers, only the lengths 3, 4, and 5 will form a right triangle.

8^2 ≠ 6^2 + 7^2 . . . . for a right triangle, the square of the hypotenuse must be the sum of the squares of the legs

64 ≠ 36 + 49 = 85

6 0

3 years ago