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DaniilM [7]
3 years ago
9

Is the expression 4x − 3(5x − 1) is equivalent to the expression 3 + 9x. true faulse

Mathematics
2 answers:
KIM [24]3 years ago
5 0

Answer:

false

Step-by-step explanation:

i know it is

Brilliant_brown [7]3 years ago
3 0
False because 4x-3(5x-1) is -14x and 3+9x is 6x
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A wire 31 cm long is cut into two pieces. the longer piece is 5 cm longer than the shorter piece. find the length of the shorter
oksian1 [2.3K]
Let the longer piece be x+5
Let the shorter piece by x

Both the wires together make 31cm so

x + x + 5 = 31
2x + 5 = 31
2x = 26
x=13

The shorter piece of the wire is 13cm.
8 0
4 years ago
NASA launches a rocket at t=0 seconds. Its height, in meters above sea-level, as a function of time is given by h(t)=−4.9t2+121t
Alenkasestr [34]

NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by

h(t)=-4.9t^2+121t+283

The sea level is represented by h = 0, therefore, to find the corresponding time when h splashes into the ocean we have to solve for t the following equation:

h(t)=0\implies-4.9t^2+121t+283=0

Using the quadratic formula, the solution for our problem is

\begin{gathered} t=\frac{-(121)\pm\sqrt{(121)^2-4(-4.9)(283)}}{2(-4.9)} \\ =\frac{121\pm142.083778...}{9.8} \\ =\frac{121+142.083778...}{9.8} \\ =26.8452834694... \end{gathered}

The rocket splashes after 26.845 seconds.

The maximum of this function happens at the root of the derivative. Differentiating our function, we have

h^{\prime}(t)=-9.8t+121

The root is

-9.8t+121=0\implies t=\frac{121}{9.8}=12.347

Then, the maximum height is

h(12.347)=1029.99

1029.99 meters above sea level.

6 0
2 years ago
The sum of three numbers is 10. The first number minus the second plus the third is 6. The first minus the third is 2 more than
saul85 [17]
This is an answer I wrote last year check it out I have it in my progress

4 0
3 years ago
Read 2 more answers
Need a quick answer please
ElenaW [278]

Answer:

X=10

MArk me brainliest

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Please help it is question 13
Dovator [93]

increasing in AB

from BD the function is neither increasing nor decreasing ( constant )

from DE the function is decreasing



8 0
4 years ago
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