Determine a área de um retângulo, sabendo que este tem 46 cm de perímetro e que o comprimento excede 7 cm a largura. □ x

x+7

Podemos representar a largura por x e o comprimento por x+7, pois o comprimento mede 7 cm a mais que a largura. Dessa forma, 2x+2(x+7)=46

Step-by-step explanation:

(The following problem has been presented in Portuguese and for that reason explanation will be presented in Spanish, which has some simillarities with Portuguese)

Sean y el largo y la altura del rectángulo, el perímetro y el área de la figura están dados por las siguientes expresiones:

y

Se determina el valor de x a partir de la expresión del perímetro:

Finalmente, el área del rectángulo es:

whatever you can spend with $11.53 or under.

step-by-step explanation:

20 - 8.47 = 11.53. take away the money he used for lunch from the starting amount of 20.

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.