The answer is 5 you can also use your fingers no I’m not calling you dumb I’m just saying you can
Answer:
1070 cm.
Step-by-step explanation:
Its correct for Khan Academy:)
Let x represent the shorter sides, then 2x + 1 would represent the longer sides. There are four short sides and two long sides. The perimeter is 162 cm. The equation: 4x + 2(2x + 1) = 162 4x + 8x + 2 = 162 8x + 2 = 162 Subtract 2 from both sides. 8x = 160 Divide both sides by 8. x = 20 The shorter sides are 20 cm in length. The longer sides are 2x + 1, or 41 cm in length. Check: 4 * 20 + 2 * 41 = 162 80 + 82 = 162 162 = 162, values check.
Answer:
8 9.8 - 6.4n
9 15 - j/2
Step-by-step explanation:
8
2.8 - 4.4n - 2n +7
= 2.8+7 -4.4n -2n
= 9.8 - 6.4n
9
11 + (-3) - 1/8 j - 3/8 j +7
= 11 - 3 - 1/8 j - 3/8 j + 7
= 11 - 3 + 7 - 1/8 j - 3/8 j
= 15 - 4/8 j
= 15 - j/2
Answer:
238
Step-by-step explanation:
28÷4=7
7x6=42
7x3=21
7x4=28
7x7=49
7x3=21
7x3=21
7x4=28
(28x3)+(21x3)+49+42
84+(21x3)+49+42
84+63+49+42
147+49+42
147+91
238
