3 years ago

Kim got a "40" in a class and I make a 70 on a test. How much does the grade goes up?

Mathematics

1 answer:

KATRIN_1 [288]3 years ago

7 0

Answer:

30%

Step-by-step explanation:

You might be interested in

La suma del cuadrado de un número más el triple del mismo número es igual a dieciocho. Encuentra dicho número.

Genrish500 [490]

If the sum of the square of a number plus the triple of the same number equals eighteen, the required numbers are 3 and -6

Let the unknown number be x

The square of the number is expressed as x²

Triple of the unknown number will also be expressed as 3x

Taking the sum of both numbers and equating it to 18 will give;

$x^2 + 3x = 18\\x^2 + 3x - 18 =0$

Factorize the resulting equation:

$x^2+3x -18=0\\x^2+6x-3x-18=0\\x(x+6)-3(x+6)=0\\(x-3)(x+6)=0\\x= 3 \ and \ -6$

Hence the required numbers are 3 and -6

Learn more here; brainly.com/question/13805464

3 0

3 years ago

I dont know what to do lol

atroni [7]

Answer:

15 units

Step-by-step explanation:

The distance between two points can be found using the following formula:

$d\sf=\sqrt{(x_2-x_1)+(y_2-y_1)}$

Given points:

(-7, 5) and (2, -7)

<u>where:</u>

x₁ = -7
x₂ = 2
y₁ = 5
y₂ = -7

Substitute these points into the formula and simplify:

$\sf d=\sqrt{(2-(-7))^2+((-7)-5)^2} \ \textsf{[simplify the radicand]}\\\\ d=\sqrt{(2+7)^2+(-12)^2} \ \textsf{[simplify]}\\\\d=\sqrt{(9)^2+(-12)^2} \ \textsf{[evaluate the power]}\\\\d=\sqrt{81+144} \ \textsf{[add]}\\\\d=\sqrt{225}\ \textsf{[simplify]}\\\\d=15$