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3 years ago

Evaluate 5 + 3x for (a) x= -2 and (b)x= 3. Write your answers in simplest form.

Mathematics

2 answers:

torisob [31]3 years ago

6 0

Answer:

a. -1

b. 14

Step-by-step explanation:

5 + 3(-2)=

5 + (-6)=

-1

5 + 3(3)=

5 + 9=

Alisiya [41]3 years ago

5 0

Answer:

i really do not know the answer

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Ayo someone pls respond , I’ll give that brain god prize thing to you

eduard

Answer: Choice A

Explanation:

$\frac{h}{6}$ = quotient of h and 6

$\frac{h}{6}+7.8$ = 7.8 more than the quotient of h and 6

$\frac{h}{6}+7.8 = w$

The "is" often refers to "equals" in math translation problems like this.

Another example "h is 10" means "h = 10".

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4 years ago

2/3(18x - 12) = 7 – 3(x –3)

julsineya [31]

Answer:

x=8/5

Step-by-step explanation:

2/3(18x-12)=7-3(x-3)

2/3(18x-12)=7-3x+9

12x-8=-3x+16

12x-(-3x)-8=16

12x+3x-8=16

15x-8=16

15x=16+8

15x=24

x=24/15

simplify

x=8/5

7 0

4 years ago

Last question! Find the equation of the line Y=__x +__

krek1111 [17]

The answer is y=-2/6x + 5

7 0

3 years ago

Sin (3x) dx = ? find the integral

AVprozaik [17]

Answer:

$\displaystyle \displaystyle \int {sin(3x)} \, dx = \frac{-cos(3x)}{3} + C$

General Formulas and Concepts:

Calculus

Antiderivatives - Integrals

Integration Constant C

Integration Property [Multiplied Constant]: $\displaystyle \int {cf(x)} \, dx = c \int {f(x)} \, dx$

Trig Integration: $\displaystyle \int{sin(x)} \, dx = -cos(x) + C$

U-Substitution

Step-by-step explanation:

Step 1: Define

$\displaystyle \int {sin(3x)} \, dx$

Step 2: Identify Substitution Variables

u = 3x

du = 3dx

Step 3: Integrate

[Integral] Rewrite: $\displaystyle \frac{1}{3}\int {3sin(3x)} \, dx$
[Integral] U-Substitution: $\displaystyle \frac{1}{3}\int {sin(u)} \, du$
[Integral] Trig Integration: $\displaystyle \frac{1}{3}[-cos(u)] + C$
[Expression] Multiply: $\displaystyle \frac{-cos(u)}{3} + C$
[Expression] Back-Substitute: $\displaystyle \frac{-cos(3x)}{3} + C$

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3 years ago

Which polynomial identity will prove that 65 = 81 - 16

steposvetlana [31]

9^2 - 4^2 = (9 + 4)(9 - 4)
So the polynomial identity used here is
$(x + y)(x - y) = {x}^{2} - {y}^{2}$

8 0

3 years ago