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Sunny_sXe [5.5K]

3 years ago

7

What is -3/2 - 7/4 + 1/8

1 answer:

Eddi Din [679]3 years ago

3 0

Answer:

3/8

Step-by-step explanation:

-3/2 can change to -12/8

7/4 can change to 14/8

1/8 stays the same

-12/8 + 14/8 = 2/8 + 1/8 = 3/8

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2x² - 5x+1 has roots alpha and beta. Find alpha⁴+beta⁴ without solving the equation.

shepuryov [24]

Answer:

Step-by-step explanation:

$\alpha+\beta=\dfrac{5}{2} \\\\\alpha*\beta=\dfrac{1}{2} \\\\\alpha^2+\beta^2=\dfrac{21}{4} \ (see\ previous\ post)\\\\(\alpha+\beta)^4=\dfrac{625}{16} \\\\=\alpha^4+\beta^4+4*\alpha^3*\beta+6*\alpha^2*\beta^2+4*\alpha*\beta^3\\\\=\alpha^4+\beta^4+4*(\alpha*\beta)(\alpha^2+\beta^2)+6*\alpha^2*\beta^2\\\\\alpha^4+\beta^4=(\alpha+\beta)^4-4*(\alpha*\beta)(\alpha^2+\beta^2)-6*\alpha^2*\beta^2\\\\= \dfrac{625}{16} -4*\dfrac{1}{2} *\dfrac{21}{4} -6*(\dfrac{1}{2})^2 \\\\$

$= \dfrac{625}{16}- \dfrac{168}{16}-\dfrac{24}{16}\\\\\\= \dfrac{433}{16}$

7 0

3 years ago

Three horses equally share 16 and 1/5 pounds of hay. How many pounds of hay does each horse receive? answer asap plssss

natka813 [3]

Answer:

They each receive 5.40 pounds of hay

Step-by-step explanation:

16 1/5 ÷3 = 5.40 I checked it by multiplying 5.40×3 and I got the same answer so it should be correct!

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3 years ago

Natalie has $20 to spend on 5 sandwiches. Can she spend $4.39 on each sandwich? Explain.

uranmaximum [27]

No she can't spend $4.39 for each sandwich because if you divide 20 by 5 your quotient will be 4.

6 0

3 years ago

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An executive committee consists of 13 members: 5 men & 8 women. 3 members are selected at random to attend a meeting in Hawa

Sever21 [200]

Answer:

5 men 8m women 3members

Step-by-step explanation hope this helps

3 0

3 years ago

What is the value of "c" in the quadratic equation 3x 2 + 5x + 7 = 0? 3 5 7

Maslowich

Answer:

7

Step-by-step explanation:

The standard form of a quadratic equation is

y = ax² + bx + c where a ≠ 1

c is the number without a variable

5 0

3 years ago

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