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Hoochie [10]
3 years ago
8

Whats -5/3+ 2 1/3 please help i dont wanna failPLWASEEE

Mathematics
1 answer:
Softa [21]3 years ago
7 0

Step-by-step explanation:

=  -  \frac{5}{3}  + 2 \frac{1}{3}

= - \frac{5}{3} +  \frac{7}{3}

=  \frac{2}{3}

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I need help with this question pleas e
ollegr [7]

Answer:

B

Step-by-step explanation:

The double angle formulae for cosine is

cos2x = cos²x - sin²x

[ using sin²x + cos²x = 1 ]

cos2x = cos²x - (1 - cos²x) = cos²x - 1 + cos²x = 2cos²x - 1

Also cos2x = (1 - sin²x) - sin²x = 1 - sin²x - sin²x = 1 - 2sin²x

The double angle formulae are

cos2x = cos²x - sin²x = 2cos² - 1 = 1 - 2sin²x

Hence

cos60° = cos²30° - sin²30°

cos60° = 2cos²30° - 1

cos60° = 1 - 2sin²30°

B is not a representation of cos60°

         

4 0
3 years ago
A rocket ship travels at 2.0×104 miles per hour. If a satellite is 2.5×105 miles from​ Earth, how long will it take the rocket t
EleoNora [17]

Answer:

20104 and 25105

Step-by-step explanation:

6 0
3 years ago
The temperature at 3 a.m. was 3 1/2 degrees Fahrenheit. For the next 7 hours, the
ValentinkaMS [17]

Answer:

The equation 7(-1 1/2) = -10 1/2 means that the temperature change from 3 a.m. to  10 a.m. was -10 1/2 degrees

Step-by-step explanation:

Initially, the temperature was 3 1/2 degrees Fahrenheit at 3 a.m. From 3 a.m., the temperature change at 1 1/2 degrees per hour for the next 7 hours. This means that the temperature change in the next 7 hours is:

Temperature change = 7(-1 1/2) = -10 1/2

In the next 7 hours from 3 a.m. to 10 a.m., that is at 10 a.m. (3 a.m. + 7 hours), the temperature change was -10 1/2 degrees Fahrenheit.

Hence:

The equation 7(-1 1/2) = -10 1/2 means that the temperature change from 3 a.m. to  10 a.m. was -10 1/2 degrees

4 0
3 years ago
Plz help also plz tell me step by step plz!
jolli1 [7]

Answer:

A= 60

Step-by-step explanation:

1/2*12*10

60

3 0
3 years ago
Please answer 4 - 9 will mark brainlyist
miv72 [106K]

There are 180 degrees in a triangle

4. 38+38= 76 degrees

180-76=104

Isosceles, Obtuse

5. 65+ x+x=65

Well we know one of the x

It is 90 degrees because it is a right angle

65+90=155

180-155=25

Scalene, Right triangle

6. 71+45= 116

180-116=64

7.  Scalene, acute

8. 126+22=148

180-148=32

Scalene, Obtuse

9. 50+90=140

180-140=40

Right angle,  Scalene

Please let me know if i got anything wrong

8 0
3 years ago
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