29.如圖,數(shù)軸上A、B兩點(diǎn)對(duì)應(yīng)的數(shù)分別為-30、16,點(diǎn)P為數(shù)軸上一動(dòng)點(diǎn),點(diǎn)P對(duì)應(yīng)的數(shù)為x.
(1)填空:若x=-34時(shí),點(diǎn)P到點(diǎn)A、點(diǎn)B的距離之和為
.
(2)填空:若點(diǎn)P到點(diǎn)A、點(diǎn)B的距離相等,則x=
.
(3)填空:若BP=10,則AP=
.
(4)若動(dòng)點(diǎn)P以每秒2個(gè)單位長(zhǎng)度的速度從點(diǎn)A向點(diǎn)B運(yùn)動(dòng),動(dòng)點(diǎn)Q以每秒3個(gè)單位長(zhǎng)度的速度從點(diǎn)B向點(diǎn)A運(yùn)動(dòng),兩動(dòng)點(diǎn)同時(shí)運(yùn)動(dòng)且一動(dòng)點(diǎn)到達(dá)終點(diǎn)時(shí)另一動(dòng)點(diǎn)也停止運(yùn)動(dòng),經(jīng)過t秒PQ=14,求t的值.