3 years ago

Value of 3y - 10 when y = -1

Mathematics

1 answer:

inysia [295]3 years ago

7 0

3(-1)-10
-3-10
Answer: -7

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Multiply both sides by 6
(b-4)/6*6= b-4
b/2*6= 3b

Rewrite the equation
b-4= 3b

Subtract b from both sides
-4=2b

Divide both sides by 2
-2=b

Final answer: b=-2

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3 years ago

Solve the equation. Round to the nearest hundredth. Show work.

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Answer:

$x=-0.75$

Step-by-step explanation:

The given equation is

$4^{-5x-7}=6^{2x-1}$

We take logarithm of both sides to base 10.

$\log(4^{-5x-7})=\log(6^{2x-1})$

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We expand the brackets to get;

$-5x\log(4)-7\log(4)=2x\log(6)-\log(6)$

Group similar terms;

$-7\log(4)+\log(6)=2x\log(6)+5x\log(4)$

$-7\log(4)+\log(6)=(2\log(6)+5\log(4))x$

$\frac{-7\log(4)+\log(6)}{(2\log(6)+5\log(4))}=x$

$x=-0.752478$

To the nearest hundredth.

$x=-0.75$

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3 years ago

The function y = 3.75 + 1.5 (x - 1) can be used to determine the cost in dollars for a taxi ride of x miles. Give the number whi

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Step-by-step explanation:

cost for travelling 1 mile = 3.75

cost 2 miles = 5.25

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