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Substituting and evaluating algebraic expressions questions and answers
What is the value of #x^2(2y-z)# when x=y+1, y=3 and z=y-1?
A. 16
B. 32
C. 64
D. 94
(2m 33s)
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1.
What is the value of #frac{a(bc-d^2)}{a^2+b^2}# if a=2, b=4,c=8 and d=5? A.#7/18# B.#7/10# C. #3 2/3# D.#1 19/20#
2.
what is the value of: #frac{2d(a^2-cb^2)}{4d+3a}# if a=5, b=3, c=1 and d=#1/4# ? A.#1/8# B.#1/2# C.#7/32# D.#16/17#
3.
What is the value of #frac{2z^2-2(x-y)}{x-y}# if x=4, y=2 and z=3? A. 3 B. 4 C. 7 D. 16
4.
What is the value of: #frac{18a+6b^2}{c(b+8)}# if a=5, b=7 and c=2 A. 12.8 B. 5.8 C. 16.5 D. 61.8
5.
What is the value of #a^2(2b-c)# if a=4, b=3 and c=2? A. 16 B. 32 C. 94 D. 64
6.
What is the value of #frac{8a(4b^2-c^2)}{2ac+abc}# if a= #1/2#, b=3,c=4? A.8 B.#6 2/5# C.#12 4/15# D.5
7.
if m=5, p=m+3 and r=#1/2 p+2#, what is the value of #frac{4r-(p-m)}{p+r}# A. #1 1/2# B. #11/14# C.#1/9# D.#1 4/13#
8.
What is the value of: #frac{2a+b-c}{a+c}# when a=4, b=c+2 and c=a-1? A. #1 1/7# B.#1 3/7# C. #1 1/3# D. #1 1/9#
9.
What is the value of ab+#1/2 b^2c# if a=2, b=5 and c=10? A. 35 B. 60 C. 135 D. 260
10.
What is the value of# frac{3(p-q )+r}{2p-q}# given that p=6, q=r-4 and r=p+2? A. #1 3/4# B. #2 3/4# C. #3 1/2# D. #5 1/2#
11.
What is the value of:#frac{4x^2-sqrt(y^2)}{2x}# if x=4 and y=6? A. #7 1/4# B.5 C.#3 1/2# D.2
12.
What is the value of #x^2(2y-z)# when x=y+1, y=3 and z=y-1? A. 16 B. 32 C. 64 D. 94
13.
What is the value of: #frac{m+r^2}{p+r}# given m=2p, p=n+5, n=3r and r=5? A. #2 1/5# B. #2 3/5# C. #3 1/4# D. 2
14.
What is the value of: #frac{2s+r}{q}# if q=4, r=2q+1 and s=r+2? A. #5# B. #6 3/4# C.7 D. #7 3/4#
15.
What is the value of the expression #frac{p^2(n-r^2)}{nr}# given that p=4, n=6,r=2? A. #2 2/3# B. #21 1/3# C. #32# D. #1 1/3#
16.
what is the value of #1/3(2x+4y^2)+5p-8# when p=6, x=2p and y=#1/2 x-1# A. 130 B. #63 1/3# C. #43 1/3# D. #36 2/3#
17.
What is the value of #frac{r(p^2+qp)}{r+q}# given r=6, p=r+2 and q=p-3? A. #56 8/11# B. #38 6/11# C. #30 6/11# D. #20 4/5#
18.
What is the value of:#frac{2q-r}{y} +n# where n=5,y=2n,q=n+9 and r=q-6? A. 7 B. #2 1/2# C. #6 1/5# D. #11#
19.
What is the value of #frac{2w(x-2)^2}{y+1}# when x=5, y=x+3 and w=2x+y? A. 12 B. 24 C. 36 D. 144
20.
what is the value of #frac{p(2r+q)}{q}#- r, where p=3,q-p=4 and r=#frac{p+q}{2}# A.#8 5/7# B. #6 4/7# C.#2 2/7# D. #2/7#
21.
What is the value of 2b (a+c)+ac when a=b=3 and c=2? A. 66 B. 36 C. 30 D. 21
22.
What is the value of #frac{2a+b}{c}# where c=4, b=2c+1 and a=b+2? A. 3 B. #4 3/4# C.7 D.#7 3/4#
23.
What is the value of #frac{2x+3y+4z}{(yz)^2}# . If x=2, y=#x/2# and z=3y? A.9 B. #6 1/3# C. #3 1/6# D. #2 1/9#
24.
What is the value of: #frac{s(T-R)^2}{T+R^2}# if S=3, R=4, T=9? A. #1 2/13# B. # 1 13/17# C. 3 D. 9
25.
What is the value of: #frac{2r^2-t+s}{s-t}# when r=4, s=t+2 and t=r-l? A. 37 B. 17 C. 12 D. 9
26.
what is the value of #Z(x^2/4+y)-1/2# where x=3, y=x-2 and z=#1/2# A. #1 1/8# B. #7/8# C. #3/4# D. #3/8#
27.
What is the value of #x+frac{2n-r}{y}# where x=5, y=2x, n=x+9 and r=n+6? A. #2 1/2# B. #2# C. #6 1/5# D. #5 4/5#
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