A student solved z + (-0.72) = -2.5 for z using the following steps. Step 1: z + (−0.72) + (−0.72) = −2.5 + (−0.72) Step 2: z = −2.5 + (−0.72) Step 3: z = −3.22 What was the student’s error?
will give 86 points

The student added the same thing instead of the opposite to each side

Add .72 to each side to make -.72 become 0 on the left -2.5 to become -1.78 on the right

Step-by-step explanation:

z + (-0.72) = -2.5

Add . 72 to each side

z + (-0.72) + .72 = -2.5 +.72

z = -1.78

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!