All categories

3 years ago

Please help!

Mathematics

1 answer:

Aloiza [94]3 years ago

7 0

Answer:14%

Step-by-step explanation:

final grade score=a

20% of a=15

20/100 x a=15

20a/100=15

Cross multiply

20a=15 x 100

20a=1500

Divide both sides by 20

20a/20=1500/20

a=75

B% of 75=10.5

B/100 x 75=10.5

75B/100=10.5

Cross multiply

75B=10.5 x 100

75B=1050

Divide both sides by 75

75B/75=1050/75

B=14

You might be interested in

Order the numbers from greatest to least. 3.5, 6, 2)1)2 , 3)4

Lunna [17]

Greatest to Least: 212, 34, 6, 3.5

8 0

3 years ago

Read 2 more answers

Which output in this table is incorrect?

IrinaVladis [17]

Answer:

She hang share Bev's jabbed s so Johannesburg is bans ban jobs bash

6 0

1 year ago

A gold coin appreciated in value from $200.00 to $475.00 in 6 years. Find the yearly rate of appreciation. Show or explain all w

Travka [436]

Answer:

16%

Step-by-step explanation:

To solve this we are using the standard growth equation:

$y=a(1+b)^x$

Were

$y$ is the final value after $x$ years

$a$ is the initial value

$b$ is the growth factor (yearly rate of appreciation in our case) in decimal form

$x$ is the time in years

We know from our problem that gold coin appreciated in value from $200.00 to $475.00 in 6 years, so $y=475$ , $a=200$ , and $x=6$ .

Let's replace the values in our equation and solve for $b$ :

$y=a(1+b)^x$

$475=200(1+b)^6$

$\frac{475}{200} =(1+b)^6$

$2.375=(1+b)^6$

$\sqrt[6]{2.375} =\sqrt[6]{(1+b)^6}$

$1+b=\sqrt[6]{2.375}$

$b=\sqrt[6]{2.375}-1$

$b=0.155$

which rounds to

$b=0.16$

Since our appreciation rate is in decimal form, we need to multiply it by 100% to express it as percentage:

0.16*100% = 16%

We can conclude that the yearly appreciation rate of our gold coin is approximately 16%

3 0

2 years ago

Rne subtracted 6x3 2x

artcher [175]

F(x) = 3-2x/x that is the answer

5 0

2 years ago

Which solid does the net form?

aleksandr82 [10.1K]

Pretty sure it’s B.

7 0

2 years ago

Read 2 more answers