Evaluate the following functions at x=3: f(x)=x−3, g(x)=x2−3x+5, h(x)=3x3+x+3, p(x)=x+4x2+1, f(x)=∣x−5∣. Also, for f(x)=x+8, find f(4), f(−2), f(−x), f(x+3), and f(x2+x+1).
Belinda has 400 R5 coins and wants at least 120 left after taking out 56 each week. What inequality models this? Options:
a. 400−56k≤120
b. 400−56k>120
c. 400−56k<120
d. 400−56k≥120
What function represents the world's population P (in billions) t years after 1975, given a 1.9% growth rate?
A) P(t)=4(1.019)t
B) P(t)=4(1.9)t
C) P(t)=1.19t+4
Choose the false statement about monomials: 1. A monomial is a number, variable, or product of a number and variables with whole number exponents. 2. −3x4y is a monomial. 3. −3x4y+2xy is a monomial.
Choose the false statement about degrees of polynomials: 1. For 4x3+2x2, the degree is 3. 2. For 2x2−5x4, the degree is 4. 3. For −5x2+10x, the degree is 3.
Choose the false statement about coefficients: 1) It's the number in front of a monomial. 2) It's always a number. 3) It's the number at the end of a polynomial in standard form.
Choose the false statement about polynomials: 1. A polynomial can include whole number exponents. 2. A polynomial can include only addition or subtraction. 3. A polynomial cannot include an equal sign.
A charged ball (20.0 nC) is at the center of a hollow shell (8 cm inner, 10 cm outer). Find: (a) Inner surface charge density. (b) Outer surface charge density. (c) Electric flux through spheres of radii 5 cm, 9 cm, and 11 cm.
1. Find the identity element for a∗b=a+b−3.
A. 3 B. 2 C. 0 D. -3 2. Find the sum of the sequence 4,−2,1,−21,….
A. −43 B. 43 C. 38 D. 8 3. Solve 256(x+1)=8(1−x2).
A. −1,−35 B. −83,−35 C. 38,53 D. 38,35 4. If α and β are roots of x2+3x−4=0, find α2+β2−3αβ.
A. -11 B. 20 C. 21 D. 29 5. Rationalize 3−21.
A. 3−2 B. 33+2 C. 23+2 D. 3+2
1. Find the identity element for the operation a∗b=a+b−3.
A. 3 B. 2 C. 0 D. -3 2. Calculate the sum of the sequence 4,−2,1,−21,….
A. −43 B. 43 C. 38 D. 8 3. Solve 256(x+1)=8(1−x2).
A. −1,−35 B. −83,−35 C. 38,53 D. 38,35 4. For roots α and β of x2+3x−4=0, find α2+β2−3αβ.
A. -11 B. 20 C. 21 D. 29 5. Rationalize 3−21.
A. 3−2 B. 33+2 C. 23+2 D. 3+2 6. Solve log5(6x+7)−log56=2 for x.