A photograph is enlarged to make a poster. The photograph is 10 cm wide and 16 cm high. The poster is 25 cm wide. How high is the poster? Explain your reasoning

40cm

Step-by-step explanation:

set up a proportion of width to height.

10/16 = 25/x

cross multiply to get 10x = 400

solve for x and get 40 cm

check your answer by seeing that the poster width (25) is 2.5 x larger than the photograph width (10). the height should have the same ratio, so 16 x 2.5, does indeed = 40.

5x + 5

step-by-step explanation:

you should always add the diagrams and graphs we cannot see. this particular question is kind of borderline because we can make a graph for you.

(f + g)x = -x^2 +3x + 5 + x^2 + 2x

(f + g)x = 5x + 5

the graph of z = 5x + 5 is shown below. always use desmos when in doubt.

answer: x=3 and y=4

step-by-step explanation: