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larisa [96]
3 years ago
15

Find the sum. 3/7+-1/7

Mathematics
2 answers:
nadezda [96]3 years ago
6 0

Answer:

2/7

Step-by-step explanation:

set the equation as 3/7-1/7

by adding a negative to a positive you're subtracting

ycow [4]3 years ago
3 0

Answer:

2/7

Step-by-step explanation:

adding a negative is the same thing thing as subtracting a positive

so

3/7 + (-1/7) = 3/7 - 1/7 = 2/7

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4cos^2(x)-7cos(x)+3<br> Please help and explain how you did it :)
dangina [55]

I assume you're asked to solve

4 cos²(<em>x</em>) - 7 cos(<em>x</em>) + 3 = 0

Factor the left side:

(4 cos(<em>x</em>) - 3) (cos(<em>x</em>) - 1) = 0

Then either

4 cos(<em>x</em>) - 3 = 0   <u>or</u>   cos(<em>x</em>) - 1 = 0

cos(<em>x</em>) = 3/4   <u>or</u>   cos(<em>x</em>) = 1

From the first case, we get

<em>x</em> = cos⁻¹(3/4) + 2<em>nπ</em>  <u>or</u>   <em>x</em> = -cos⁻¹(3/4) + 2<em>nπ</em>

and from the second,

<em>x</em> = <em>nπ</em>

where <em>n</em> is any integer.

7 0
3 years ago
Can someone help me in this math problem? It’s a picture of the problem if you can!
lakkis [162]
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7 0
3 years ago
Tres compañías aportan capitales para hacer una investigación la estrella aporta 509000 724 flechabús la mitad de lo que aporta
Step2247 [10]

Answer:

En total, se invirtieron $960,000 por parte de las tres empresas.

Step-by-step explanation:

Para resolver cuánto dinero aportaron en total las tres empresas, es necesario determinar la cantidad de dinero que cada una de ellas aportó en forma particular. Así:

La Estrella: 509,000

Flechabus: (509,000 / 2) + 23,184

                   254,500 + 23,184

                   277,684

La Terminal: ((509,000 / 2) + 23,184) - 104,208

                     277,684 - 104,208

                     173,476

Ahora bien, para determinar el total invertido se requiere sumar dichos montos: 509,000 + 277,684 + 173,476 = 960,160

Así, en total, se invirtieron $960,000 por parte de las tres empresas.

3 0
3 years ago
Marley drives to work every day and passes two independently operated traffic lights. The probability that both lights are red i
IgorLugansk [536]
Probability1 *Probability2
0.35 = 0.48 * P2

0.35/0.48 = P2
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4 0
3 years ago
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Answer:

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parallelogram

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