Allen's work is not written properly so I have rearranged it as shown below:
Original problem) –8.3 + 9.2 – 4.4 + 3.7.
Step 1) −8.3 + 9.2 + 4.4 + 3.7 Additive inverse
Step 2) −8.3 + 4.4 + 9.2 + 3.7 Commutative property
Step 3) −8.3 + (4.4 + 9.2 + 3.7) Associative property
Step 4) −8.3 + 17.3
We can see that in step 1), Allen changed -4.4 into +4.4 using additive inverse. Notice that we are simplifying not eliminating -4.4 as we do in solving some equation. Hence using additive inverse is the wrong step.
Alen should have collect negative numbers together and positive numbers together.
Add the respective numbers then proceed to get the answer.
–8.3 + 9.2 – 4.4 + 3.7
= –8.3 – 4.4 + 9.2 + 3.7
= -12.7 + 12.9
= 0.2
Answer:
B
Step-by-step explanation:
Because the rest are wrong. It is just asking you to compare the numbers. choice B says that Group 1/A needs 6 more lessons than Group 12/B
Answer:
54
Step-by-step explanation:
Substitute n into the equation:
-2(3)[5+3-8-3(3)]
-6[-9]
+54
Slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept (the point at which the line intersects the y-axis).
y + 4 = -2(x - 1) is in point-slope form, which is y - b = m(x - a), where m is the slope and (a, b) is a point on the line. To get this equation to slope-intercept form, isolate y.
Given:
y + 4 = -2(x - 1)
Distribute the -2:
y + 4 = -2x + 2
Subtract 4 from both sides:
y = -2x + 2 - 4
Collect like terms:
y = -2x - 2
Answer:
y = -2x - 2
The slope is -2 (as can be seen from the original point-slope equation) and the y-intercept is (0, -2).
