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3 years ago

PLS HURRY 50 POINTS

Mathematics

2 answers:

Varvara68 [4.7K]3 years ago

8 0

Answer:

[6+√-64 ]x 3-√-16

6+8 x3+4

14 x 7

=98

Step-by-step explanation:

pashok25 [27]3 years ago

7 0

$\\ \sf\longmapsto [6+\sqrt{-64}]\times 3-\sqrt{-16}$

$\\ \sf\longmapsto (6+8i)(3-4i)$

$\\ \sf\longmapsto 6(3-4i)+8i(3-4i)$

$\\ \sf\longmapsto 18-24i+24i+32$

$\\ \sf\longmapsto 18+32$

$\\ \sf\longmapsto 50$

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A shopper bought shoes marked $45. The sales tax is 6.5%. How much did the shopper pay in all

seraphim [82]

45 times 1.065=47.925 which would be $47.93... hope that helps

5 0

3 years ago

In right triangle ABC, A=15°, C=37, and angle C is the right angle. Solve the triangle. Round to the nearest tenth, if necessaar

Mice21 [21]

Answer:

180 degrees

Step-by-step explanation:

The sum of the interior angles of a triangle is 180 degrees. Since angle C is 90 degrees and angle A is 15 degrees Then,

A+B+C=180

15+90+B=180

B=180-90-15

B=75 degrees

Using the sine law,

a/sinA = b/sinB = c/sinC

where a, b, and c are the sides of the triangle,

So,

a/sin15 = 37/sin90

and

b/sin75 = 37/sin90

Simplifying, and solving for a and b, the measure of each side is

a= 9.58 units

b=35.74 units

I hope this helped. I am sorry if you get this wrong.

5 0

3 years ago

I will mark you brainliest if its correctly

zheka24 [161]

Step-by-step explanation:

sina = -√3/2

$\cos(a) = \sqrt{1 - { \sin(a) }^{2} }$

$= \sqrt{1 - { (\frac{ - \sqrt{ 3} }{2}) }^{2} }$

$= \sqrt{ \frac{4 - 3}{4} }$

$= \sqrt{ \frac{1}{4} }$

=±1/2

Since, π<a<3π/2

cos a = -1/2

$\tan(a )= \frac{ \sin(a) }{ \cos(a) }$

$\tan(a ) = \sqrt{3}$

OptionB

8 0

3 years ago

The cost to purchase a song from iTunes is $0.99 per song. To purchase a song from Napster, you must be a member. The Napster me

Ganezh [65]

Answer:

d=100

Step-by-step explanation:

.99d=10 + .89d

subtract .89d from both sides

.1d=10

divide by .1 on both sides

d=100

to check plug in 100 in place of d

8 0

3 years ago

asmine wants to use her savings of $1128 to buy video games and music CDs. The total price of the music CDs she bought was $72.

Inga [223]

Let g represent video games. The equation you can use to solve for the amount of video games and CDs Jasmine can buy with her savings is:
43g+72=1128

The 43g part is because it costs 43 dollars for every video game, so you need to multiply 43 by the amount of games she buys to get the total for g games.
The +72 part is because you already have the amount spent on CDs, and needs to be added to the cost of video games, so that the sum would be equal to 1128.

Now, solving:
43g+72=1128 ...subtract 72 from both sides
43g=1056 ...divide both sides by 43 to isolate g
g=24.5581395349
Rounded up, that would be 25 games, but Jasmine's savings isn't enough to buy 25 games that cost $43 each, so you would go down to 24 games.

The answer: Jasmine can buy 24 games with her savings after spending $72 on CDs.

8 0

3 years ago