Explain your answer (if u dont have time thats ok too)

The value of 2x + 2y, for x = 7 and y = 3, is 50.

So 2x + 2y = 50 when x = 7 and y = 3

2x + 2y = 50    Since x = 7, plug in 7 for "x". Since y = 3, plug in 3 for "y".

2(7) + 2(3) = 50

14 + 6 = 50

20 = 50

This is False because when x = 7 and y = 3, the value of 2x + 2y is 20, not 50.

The value of x²y², for x = 3 and y = 3, is 36.

So x²y² = 36 when x = 3 and y = 3

x²y² = 36   Plug in 3 for "x", and plug in 3 for "y"

(3)² · (3)² = 36

9 · 9 = 36

81 = 36

This is False because when x = 3 and y = 3, the value of x²y² is 81, not 36.

a is the correct

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.

step-by-step explanation:

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.