AccelePrep for the ACT Test 2nd Edition Student Text

C HAPTER 4 | F AST T RACK TO M ATH M ECHANICS • 87

STEP 3—CHECK YOUR ANSWER

Š‡ ϐ‹ƒŽ •–‡’ ‘ˆ –Š‡ ƒ‡ Žƒ ‹• –‘…Š‡… ›‘—” ƒ•™‡” „‡ˆ‘”‡ „—„„Ž‹‰ ‹– ‘ ›‘—” ƒ•™‡” •Š‡‡– ‘”…‘ϐ‹”‹‰ ‹– ‘ –Š‡…‘’—–‡”Ǥ Š‹• †‘‡•ǯ– mean double-check your calculations—the answer choices do this for ›‘—Ǥ ƒ–Š‡”ǡ…Š‡… –Šƒ– ›‘—” ƒ•™‡” ƒ…–—ƒŽŽ› ƒ•™‡”• –Š‡ “—‡•–‹‘ ƒ•‡†Ǥ Ž™ƒ›• †‘—„Ž‡Ǧ…Š‡… –Š‡ —‹–• ‹ˆ —‹–• ƒ”‡ ‹˜‘Ž˜‡†Ǥ

SUM IT UP – MATH GAME PLAN

Step 1—Preview the Question • ‹˜‹†‡ ƒ† ‘“—‡” • Read the Question Carefully • ƒ› ––‡–‹‘ –‘ ‹–• ƒ† Š‘—‰Š–Ǧ ‡˜‡”•‡”• • •‡ǡ ‹•–‘”–ǡ ƒ† ”ƒ™ ‹‰—”‡• • •‡ ‘—” ƒŽ…—Žƒ–‘”ǡ „—– ‘ǯ– ˜‡”—•‡ – Step 2—Strategize and Solve • Use the Answer Choices • Plug-and-Chug • Test-the-Test Step 3—Check Your Answer

POWER PRACTICE 1 DIRECTIONS: ‘Ž˜‡ –Š‡ ’”‘„Ž‡• ‹ –Š‹• †”‹ŽŽ —•‹‰ –Š‡ ƒ‡ ŽƒǤ Š‡ ’”‘„Ž‡• ‹…”‡ƒ•‡ ‹ †‹ˆϐ‹…—Ž–› ™‹–Š ‹…”‡ƒ•‹‰ ‹–‡ —„‡”Ǥ ‹”…Ž‡ ›‘—” ƒ•™‡”•Ǥ 1. Š‡ ƒ‰‡–• ƒ– ƒ ”‡‰‹‘ƒŽ ƒ‹”’‘”– •‡Ž‡…– ˆ‘” ‹•’‡…–‹‘ „› Šƒ† ͻ…ƒ””›Ǧ‘ „ƒ‰• ‘—– ‘ˆ ‡˜‡”› ͹ͷͲ „ƒ‰• –Šƒ– ƒ”‡ ‹•’‡…–‡† „› šǦ”ƒ›Ǥ – –Š‹• ”ƒ–‡ǡ how many carry-on bags will be inspected by hand out of 10,000 bags that are x-rayed? Ǥ ͳʹ Ǥ ͺͷ Ǥ ͳʹͲ Ǥ ͳ͵Ͳ Ǥ ͳͷͲ

2. ˆ –Š‡ •— ‘ˆ ϐ‹˜‡…‘•‡…—–‹˜‡ ‘†† ‹–‡‰‡”• ‹• ͸ͺͷǡ ™Šƒ– ‹• –Š‡ Žƒ”‰‡•– ‘ˆ –Š‡•‡ ‹–‡‰‡”•ǫ Ǥ ͳ͵͵ Ǥ ͳ͵͹ Ǥ ͳͶͳ Ǥ ͳͶͷ Ǥ ͳͶ͸ 3. Š‹…Š ‘ˆ –Š‡ ˆ‘ŽŽ‘™‹‰ ‹• ‡“—‹˜ƒŽ‡– –‘ 10 1 10 1 25 26 ? Ǥ 10 Ǥ 10 9 25 Ǥ 10 1 25 Ǥ 10 9 26 Ǥ 10 9 25