Apineapple is 7 times as heavy as an orange.
-the pineapple also weighs 870 grams more than the orange.

what is the total weight in grams for the pineapple and orange?

Total weights for the orange and pineapple = 145 + 1015 = 1160 grams.

Step-by-step explanation:

Let the weight of pineapple be x grams and weight of orange by y grams.

Now, weight of a pineapple = 7 (weight of an orange)

∴ x = 7y

Also, x = y + 870 (∵ pineapple weighs 870 more than pineapple)

Substituting the value of x in above equation,

7y = y + 870

7y - y = 870

6y = 870

y = 870/6 = 145

Weight of an orange = 145 grams

Weight of pineapple = 7 × 145 = 1015 grams

Total weights for the orange and pineapple = 145 + 1015 = 1160 grams.

the rocket cannot penetrate the ground, in a contextual sense, therefore the roots of this equation should be the domain of this function. i'll let you find the roots of this quadratic equation (hint: use the quadratic formula:  

1- c

2-a

step-by-step explanation:

mark brainliest!

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct