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2 years ago

If someone is good at Precalculus or Physics, please help me solve this.

Mathematics

1 answer:

Kobotan [32]2 years ago

8 0

Magnitude of vector V =√(3²+7²) = √58

Hence: U= -3/√58 - 7/√58

OR multiply numerator and denominator by √58

U = - (3√58)/58 i - (7√58)/58 j

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2 years ago

A yard of fabric costs 22.99 how much will 2 feet costs

marshall27 [118]

$\frac{22.99}{3ft} = \frac{d}{2ft} \\ \\ d=15.33$

7 0

3 years ago

Read 2 more answers

What is the measure of angle A?

antoniya [11.8K]

Answer:

A = 19.47

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

sin theta = opp / hypotenuse

sin A = 2/6

Take the inverse sin of each side

sin ^-1 ( sin A) = sin ^-1 (2/6)

A =19.47122063

To the nearest hundredth

A = 19.47

3 0

3 years ago

Triangle ABC has angle measures as shown. What is the value of X? Show your calculations.

dezoksy [38]

180-96= 84
That means 8x+12=84
84-12=72
That means 8x=72
72÷8=9
therefore X=9

8 0

3 years ago

Factorize the following algebraic expression:

Hoochie [10]

X^2+16-38=0
find what 2 numbers multiply to get -38 and add to get 16
find factors of 38
2 times 19
there is no way to use common factor so use quadratic formula which is
x= $\frac{ -b+\sqrt{b^2-4ac} }{2a}$ or x= $\frac{ -b-\sqrt{b^2-4ac} }{2a}$

ax^2+bx+c=0 subsitte
a=1
b=16
c=-38
subsitute
$\frac{ -16+\sqrt{16^2-4(1)(-38)} }{2(1)}$ = $\frac{ -16+\sqrt{256+152} }{2}$ = $\frac{ -16+\sqrt{408} }{2}$ = $\frac{ -16+2\sqrt{102} }{2}$ = $-8+\sqrt{102}$
so the answers for x are $-8+\sqrt{102}$ and $-8-\sqrt{102}$ which are aprox -2.099504938362 and +18.099504938362
so it would be
(x-[-8+√102])(x+[8+√102])=0

6 0

2 years ago