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3 years ago

Plz help due 2morrow 14 and 15

Mathematics

1 answer:

lions [1.4K]3 years ago

6 0

Answer:

14 length of the side is 3x-7

and 15 length of side is 2x+6

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Alyn drives 20.4 miles in 17 minutes.

Galina-37 [17]

Answer:

12 mph

Step-by-step explanation:

Speed = distance/time

Distance = 20.4 miles
Time = 17 minutes = 17*1/60 hours = 17/60 hours

Speed is:

20.4 : 17/60 =
20.4*60/17 =
72 mph

Alyn exceeded the limit by:

72 - 60 = 12 mph

5 0

3 years ago

What is 15 1/8 - 1 3/5

AnnZ [28]

15 1/8 -1 3/5=
15 5/40 -1 24/40=
605/40 - 64/40=
541/40= 13 21/40

Answer:13 21/40

8 0

4 years ago

Read 2 more answers

A radioactive substance has a continuous decay rate of 0.056 per minute. How many grams of a 120 gram sample will remain radioac

sammy [17]

Answer:

The mass of the radioactive sample after 40 minutes is 12.8 g.

Step-by-step explanation:

The mass of the sample can be found by using the exponential decay equation:

$N_{t} = N_{0}e^{-\lambda t}$

Where:

N(t): is the amount of the sample at time t =?

N₀: is the initial quantity of the sample = 120 g

t = 40 min

λ: is the decay constant = 0.056 min⁻¹

Hence, the mass of the sample after 40 min is:

$N_{t} = N_{0}e^{-\lambda t} = 120g*e^{-0.056min^{-1}*40 min} = 12.8 g$

Therefore, the mass of the radioactive sample after 40 minutes is 12.8 g.

I hope it helps you!

5 0

3 years ago

The x3 was supposed to be an exponent not 3x

mote1985 [20]

Answer:

The value of x is $2\sqrt[3]{2}$

Step-by-step explanation:

We are given $2+x^3=18$

We need to solve for x

First we subtract 2 both sides

$x^3=18-2=16$

Taking cube roots both sides to isolate x

$x=\sqrt[3]{16}$

Simplify the radical

$x=2\sqrt[3]{2}$

Thus, The value of x is $2\sqrt[3]{2}$

8 0

3 years ago

HELP ASAP I NEED THIS TODAY ONLY I WILL MARK BRAINLIEST

Serjik [45]

Answer:

Step-by-step explanation:

1a. 14

1b. it's positive

2. If we were to just go with an estimation, i would say anywhere between 50-60, but I'm going with 50

4 0

3 years ago