ft Challenge 65. Reasoning Y o u r f r i e n d says t h a t t h e s o lu t io n o f 15 = 4 + 2t is b e tw e e n tw o
consecutive integers, because 15 is an odd num ber and 4 and 2 are both even
n u m b e r s. E x p la in y o u r f r i e n d ’s r e a s o n in g.66. C o n s t r u c t i o n A c o n s t r u c t io n c r e w n e e d s t o in s t a ll 5 5 0 f t o f c u r b in g a lo n g a s tre e t.
T h e c r e w c a n in s t a ll c u r b in g a t a r a te o f 3 2 f t / h. Y e s te r d a y th e c r e w in s t a lle d 2 7 2 f t
o f c u r b in g. T o d a y i t w a n ts to f in is h th e jo b i n a t m o s t 10 h , w h ic h i n c lu d e s a 1 5 - m in
d r iv e t o th e jo b , a n h o u r l u n c h b re a k , a n d 4 5 m i n t o b r e a k d o w n t h e e q u ip m e n t.
Can the crew achieve its goal? Explain.MP4
L o o k b a c k a t t h e i n f o r m a t i o n o n p a g e 3 a b o u t th e w a lk o f fa m e N a o m i is
d e s ig n in g , a n d a t y o u r w o r k i n t h e A p p ly W h a t Y o u ’v e L e a r n e d s e c tio n s i n
L e s s o n s 1-1 a n d 1-7. C h o o s e f r o m t h e f o l l o w i n g n u m b e r s a n d e x p re s s io n s to
com plete the sentences below.n + 2 14 10 30 n 565n + 10 (^2881644)
a. A n e q u a t io n t h a t c a n b e u s e d to f i n d th e v a lu e o f n th a t re s u lts in a w a lk c o s tin g
$500 is J+ J = 500.
b. S o lv in g t h e e q u a t io n s h o w s t h a t w h e n n is e q u a l t o ?,
t h e w a lk w a y w i l l c o s t $ 5 0 0.
c. T h e n u m b e r o f p la i n t ile s N a o m i s h o u ld b u y is ?.
58 Ch ap t er 1 Fo u n d a t i o n s f o r A l g e b r a