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3 years ago

Find the value of y for the given value of x. Round to the nearest hundredth.

Mathematics

1 answer:

BlackZzzverrR [31]3 years ago

5 0

Answer:

20.922

Step-by-step explanation:

Evaluate ln 7.2 on a calculator; the correct result is 1.974.

Multiply that by 3, obtaining 5.922.

Finally, add 15 to that result: y = 15 + 3 In 7.2 = 20.922

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Find the area of the trapezoid. Leave your answer in simplest radical form.

murzikaleks [220]

Answer:

The formula to find the area of a trapezoid is

A = (;a + b / 2 ) h

3 0

3 years ago

Which equation has an a-value of -2,a b-value of 1 , and a c-value of 3? A. 0=-2x^2+x+3 B. 2x^2+x+3 C. 0=-2x^2+3. 0=2x^2-x+3

katrin2010 [14]

Answer:A

Step-by-step explanation:

0=-2x^2+x+3

-2x^2+x+3=0

a=-2 b=1 c=3

6 0

3 years ago

Simplify 63 7/8- 55 3/4

ivolga24 [154]

511/8-243/4

511/8-486/8=25/8

4 0

4 years ago

If 2(4x + 3)/(x - 3)(x + 7) = a/x - 3 + b/x + 7, find the values of a and b.

zmey [24]

Answer:

$a=3$ and $b=5$ .

Step-by-step explanation:

So I believe the problem is this:

$\frac{2(4x+3)}{x-3}(x+7)}=\frac{a}{x-3}+\frac{b}{x+7}$

where we are asked to find values for $a$ and $b$ such that the equation holds for any $x$ in the equation's domain.

So I'm actually going to get rid of any domain restrictions by multiplying both sides by (x-3)(x+7).

In other words this will clear the fractions.

$\frac{2(4x+3)}{x-3}(x+7)}\cdot(x-3)(x+7)=\frac{a}{x-3}\cdot(x-3)(x+7)+\frac{b}{x+7}(x-3)(x+7)$

$2(4x+3)=a(x+7)+b(x-3)$

As you can see there was some cancellation.

I'm going to plug in -7 for x because x+7 becomes 0 then.

$2(4\cdot -7+3)=a(-7+7)+b(-7-3)$

$2(-28+3)=a(0)+b(-10)$

$2(-25)=0-10b$

$-50=-10b$

Divide both sides by -10:

$\frac{-50}{-10}=b$

$5=b$

Now we have:

$2(4x+3)=a(x+7)+b(x-3)$ with $b=5$

I notice that x-3 is 0 when x=3. So I'm going to replace x with 3.

$2(4\cdot 3+3)=a(3+7)+b(3-3)$

$2(12+3)=a(10)+b(0)$

$2(15)=10a+0$

$30=10a$

Divide both sides by 10:

$\frac{30}{10}=a$

$3=a$

So $a=3$ and $b=5$ .

4 0

3 years ago

Read 2 more answers

A roller coaster begins at 418 feet above sea level. Then it descends 384 feet. What is the height of the roller coaster after i

Ainat [17]

Answer:

34 feet

Step-by-step explanation:

418 - 384 = 34 feet above sea level

3 0

3 years ago