20. If f(11) = -6 and f(-4) = -11, which ordered pairs belong to f? (select all that apply) %3D (-4, 11) (ii) (11, –11) (vi) (iii) (11,-4) (-4, –6) (-6, 11) (vii) (-6,-4) (iv) (-4,-11) (viii) (-6, –11) (xi) (11,–6) (i) (v) (ix) (-11,-6) (x) (-11,11) (xi) (-11,-4) 21. Let f(x) = -x+3 and g(x) = -9r + 8. Find (f+g)(5). %3D 22. Evaluate (a) and (b) 8.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter9: Systems Of Linear Equations
Section9.2: The Substitution Method
Problem 19WE
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15. The height of a triangle is 5 times the length of its base. The area of the triangle is
250 square feet. Find the length of the base.
4m -8
m5
16. Multiply and simplify
m3
12m – 24
u+8
-3- u
17. Add and simplify
— Зи — 10
— Зи — 10°
-1
18. Solve 1+
56
%3D
u2
19. The deflection D of a spring (in feet) varies directly as the applied force F (in pounds).
If D = 4 feet when F = 56 pounds, find the deflection when the force is 35 pounds.
20. If f(11) = -–6 and f(-4) = -11, which ordered pairs belong to f? (select all that
apply)
(-4, –6)
(-6, 11)
(vii) (-6, –4)
(iv) (-4,-11) (viii) (-6, -11) (xii) (11,–6)
(-4, 11)
(ii) (11,–11) (vi)
(iii) (11,-4)
(i)
(ix) (-11,–6)
(x)
(-11,11)
(xi) (-11,–4)
(v)
21. Let f(x) = -r+3 and g(x) = -9r + 8. Find (f + g)(5).
22. Evaluate (a)
and (b) 8.
MacBook Air
Transcribed Image Text:15. The height of a triangle is 5 times the length of its base. The area of the triangle is 250 square feet. Find the length of the base. 4m -8 m5 16. Multiply and simplify m3 12m – 24 u+8 -3- u 17. Add and simplify — Зи — 10 — Зи — 10° -1 18. Solve 1+ 56 %3D u2 19. The deflection D of a spring (in feet) varies directly as the applied force F (in pounds). If D = 4 feet when F = 56 pounds, find the deflection when the force is 35 pounds. 20. If f(11) = -–6 and f(-4) = -11, which ordered pairs belong to f? (select all that apply) (-4, –6) (-6, 11) (vii) (-6, –4) (iv) (-4,-11) (viii) (-6, -11) (xii) (11,–6) (-4, 11) (ii) (11,–11) (vi) (iii) (11,-4) (i) (ix) (-11,–6) (x) (-11,11) (xi) (-11,–4) (v) 21. Let f(x) = -r+3 and g(x) = -9r + 8. Find (f + g)(5). 22. Evaluate (a) and (b) 8. MacBook Air
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