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3 years ago

7(-2k+4)-6=7k-20 what is the answer

Mathematics

1 answer:

lord [1]3 years ago

7 0

The answer to this equation would be k=2

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What is 8(9x-10) - 8(2x +1)

sammy [17]

Answer:

56 x − 88

Step-by-step explanation:

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4 years ago

Catherine walks her dog 3/4 mile every day how far does she walk each week.

muminat

Answer:

$5\frac{1}{4}\text{ miles}$

Step-by-step explanation:

Given,

The number of miles she walks every day = $\frac{3}{4}$

∵ 1 week = 7 days,

⇒ 1 day = $\frac{1}{7}$ week,

Thus,

The number of miles she walks $\frac{1}{7}$ week= $\frac{3}{4}$

⇒ The number of miles she walks in a week = $\frac{3}{4}\times 7=\frac{21}{4}=5\frac{1}{4}$

3 0

3 years ago

Read 2 more answers

The equation r(t)= (3t+9)i+(sqrt(2)t)j+(t^2)k is the position of a particle in space at time t. Find the angle between the veloc

andreev551 [17]

Answer:

$\theta= \frac{\pi}{2} +\pi \cdot i$ , for all $i = \mathbb{Z} \cup\{0\}$

Step-by-step explanation:

The velocity vector is found by deriving the position vector depending on the time:

$\dot r(t)= v (t) = 3 \cdot i +\sqrt{2} \cdot j + 2\cdot t \cdot k$

In turn, acceleration vector is found by deriving the velocity vector depending on time:

$\ddot r(t) = \dot v(t) = a(t) = 2 \cdot k$

Velocity and acceleration vectors at $t = 0$ are:

$v(0) = 3\cdot i + \sqrt{2} \cdot j\\a(0) = 2 \cdot k\\$

Norms of both vectors are, respectively:

$||v(0)||\approx 3.317\\||a(0)|| \approx 2$

The angle between both vectors is determined by using the following characteristic of a Dot Product:

$\theta = \cos^{-1}(\frac{v(0) \bullet a(0)}{||v(0)||\cdot ||a(0)||})$

Given that cosine has a periodicity of $\pi$ . There is a family of solutions with the form:

$\theta= \frac{\pi}{2} +\pi \cdot i$ , for all $i = \mathbb{Z} \cup\{0\}$

7 0

3 years ago

G(x) = –(x + 3)2 – 4?

professor190 [17]

Answer:

g(x)=-x-5

Step-by-step explanation:

Simplify parenthesis by distribution:

g(x)=-x-3+2-4

Addition and Subtraction:

-3+2=-1, -1-4=-5

Finalize since no more simplification:

g(x)=-x-5

Pls give thx and brainliest wanna level up

6 0

3 years ago

A family of five went to the local carnival. the family consists of, mom, a thirteen year old daughter, a 10 year old boy, and a

nadya68 [22]

Answer: The correct answer for this question is D

Step-by-step explanation:

In algebra, an equation can be defined as a mathematical statement consisting of an equal symbol between two algebraic expressions that have the same value. The most basic and common algebraic equations in math consist of one or more variables. hope this helped

6 0

3 years ago