Help please ASAP.

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Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.

In the diagram, gef and hef are congruent. what is the value of x