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2 years ago

E

Mathematics

1 answer:

WINSTONCH [101]2 years ago

3 0

Answer:

Step-by-step explanation:

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Find: (4y – 5) (3y - 7)

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I did it digitally on my iPad hope it helps please mark me brainliest

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2 years ago

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Renaming improper fractions as whole or mixed numbers 17-4

murzikaleks [220]

17/4 as a mixed fraction would be 4 1/4

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3 years ago

Match the vocabulary to the part of expression below

Fantom [35]

Answer:

Gas up in my room I don’t know how much you have to do that yet but

Step-by-step explanation:

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2 years ago

Solve (x + 4)2 – 3(x + 4) – 3 = 0 using substitution. u = Select the solution(s) of the original equation.

bezimeni [28]

Answer:

$\dfrac{-5-\sqrt{21}}{2},\ \dfrac{-5+\sqrt{21}}{2}$

Step-by-step explanation:

For the equation $(x+4)^2-3(x+4)-3=0$ use the substitution $u=x+4.$ Then the equation will take look

$u^2-3u-3=0.$

Solve this quadratic equation:

$D=(-3)^2-4\cdot 1\cdot (-3)=9+12=21,\\ \\u_{1,2}=\dfrac{-(-3)\pm \sqrt{21}}{2}=\dfrac{3\pm\sqrt{21}}{2}.$

Thus,

$x+4=\dfrac{3-\sqrt{21}}{2}\text{ or }x+4=\dfrac{3+\sqrt{21}}{2},\\ \\x_1=\dfrac{3-\sqrt{21}}{2}-4=\dfrac{-5-\sqrt{21}}{2}\text{ or }x_2=\dfrac{3+\sqrt{21}}{2}-4=\dfrac{-5+\sqrt{21}}{2}.$

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3 years ago

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An employee earns $175 for 15 hours work.<br> Find the constant of variation.

LiRa [457]

Answer:

11.67

Step-by-step explanation:

Given: Employee earn $175 for 15 hours

We know, the constant of variation means the rate of change.

To know The constant of variation, we need to find how much employee earn each hour.

∴ Constant of variation= $\frac{Total\ earning}{Total\ working\ hours}$

Constant of variation= $\frac{175}{15}= 11.666$

∴ Constant of variation= 11.67. (rounding off)

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3 years ago