4*x+7=12
4*x=5
x=5/4
The number is 5/4
For example,

They both do have the same denominator, so we can multiply them.
We need to multiply the numerators.
Next, multiply the denominators.
We then get:
1/4
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If the denominators are not the same, find the LCD (Least Common Denominator) of the two fractions. Then, follow above.
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Answer:
1.A - B
1.B - D
1.C - [unsure]
Step-by-step explanation:
A compass because youre just making two arcs
Answer: Acute
Step-by-step explanation:
∠5 is acute, since the measure of the angle is acuter than 90° when measured with a protractor.