8th grade test math help help

Cody was 165\,\text{cm}165cm tall on the first day of school this year, which was 10\%10% taller than he was on the first day of

Doss [256]

Answer:

165 cm.

Step-by-step explanation:

Let h be the height of Cody on the first day of school last year.

We have been given that Cody was 165 cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

To find the height of Cody on the first day of school last year, we need to find h such that h plus 10% of h equals 165. We can represent this information in an equation as:

$h+10\%\text{ of }h=165$

$h+(\frac{10}{100}*h)=165$

$h+0.10*h=165$

$1.10*h=165$

Let us divide both sides of our equation by 1.10.

$\frac{1.10*h}{1.10}=\frac{165}{1.10}$

$h=150$

Therefore, Cody was 150 cm tall on the first day of school last year.

5 0

4 years ago

Adapting and using formulas

Savatey [412]

Ohhh it might be...

R = d/t
tr = d
/r /r
t = d/r

7 0

3 years ago

I have a math word problem that I need help with solving it and showing me how to work it out. The question is as follows:. Bill

V125BC [204]

Get I don't know the answer but there is this app called Photo Math! it works perfectly lots of teachers recommend it I suggest you download it, it shows you the answer and show you step by step. its for iPod, iPhone, Samsung , and Androids

6 0

3 years ago

Write the point-slope equation of the line that passes through(3,5) and (7,1)

Liono4ka [1.6K]

Answer: y - 1 = –(x –7)

or y –5 = –1(x –3)

The attachment shows the graph of these equations (identical)

Step-by-step explanation:

The basic form for a point-slope equation is

y - b = m(x - a)

a is the x-value from the given coordinate, b is the y-value form the given coordinate, m is the slope. x and y are the variables in the function.

To find the slope, m, use the given coordinates. Get the difference in the y-values and divide by the difference in the x-values. This is "rise over run."

Subtract the first coordinate from the second coordinate.

Given coordinate points: (3,5) and (7,1) substitute values:

m= 1 –5 / 7 –3 becomes m= –4/4 so the slope, m = –4/4

That is –1 The "1" is "understood," so only the negative sign represents the slope in the equation

To write the equation: Take the basic form, substitute b and a values from either given coordinate. And use the value of m we just calculated.

y - b = m(x - a) Using the second coordinate: (7,1)

y - 1 = –(x –7)

or using the first coordinate:

y –5 = –(x –3)

5 0

3 years ago

Pretty PLEASE HELP ASAP, THANKS! WILL REWARD BRAINLIEST!!

shutvik [7]

You can rewrite it as
(2/3 )•(10^(13-8))= (2/3)• 10^5 ~ 0.67•10^5=
0.67•10•10^4= 6.7•10^4

Answer $6.7•10^4

5 0

4 years ago