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3 years ago

15

Solve the following equation. Then placed a correct number in the box provided. -13 - 3x = -10

1 answer:

Alisiya [41]3 years ago

5 0

Answer:

x=-1

Step-by-step explanation:

-3x=-10+13 - -3x=3 - -3 = -1

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What number is less than 337,676?

Sphinxa [80]

Not counting negative numbers there are 337,675 numbers less than 337,676

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3 years ago

Q.The length of the minute hand of a clock is 11cm. What is the distance covered by the minute hand in 1 hour ? *

Lady_Fox [76]

Answer:

$\huge\mathcal\pink{Answer( \times )} \\ \\ \huge\mathcal\green{- 69.1 \: cm \: ✓✓} \\ \\ \huge\mathfrak\purple{Hope \: it \: helps ...}$

3 0

2 years ago

djyliett [7]

Answer:

$t_1\approx2.18$

$t_2\approx0.57$

Step-by-step explanation:

$h=7+44t-16t^2$

$27=7+44t-16t^2$

$0=-20+44t-16t^2$

$0=-16t^2+44t-20$

$t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$t=\frac{-44\pm\sqrt{44^2-4(-16)(-20)}}{2(-16)}$

$t=\frac{-44\pm\sqrt{1936-1280}}{-32}$

$t=\frac{-44\pm\sqrt{656}}{-32}$

$t=\frac{-44\pm4\sqrt{41}}{-32}$

$t=\frac{11}{8}\pm\frac{\sqrt{41}}{8}$

$t_1\approx2.18$

$t_2\approx0.57$

5 0

2 years ago

Element X decays radioactively with a half life of 13 minutes. If there are 110 grams of Element X, how long, to the nearest ten

Vaselesa [24]

Answer : The time taken by the element to decay to 2 grams is, 75.2 minutes

Step-by-step explanation:

Half-life = 13 min

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{13\text{ min}}$

$k=0.0533\text{ min}^{-1}$

Now we have to calculate the time passed.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $0.0533\text{ min}^{-1}$

t = time passed by the sample = ?

a = initial amount of the reactant = 110 g

a - x = amount left after decay process = 2 g

Now put all the given values in above equation, we get

$t=\frac{2.303}{0.0533}\log\frac{110}{2}$

$t=75.2\text{ min}$

Therefore, the time taken by the element to decay to 2 grams is, 75.2 minutes

7 0

3 years ago

what is the difference between the area of the larger circle and the area of tw smaller circle? terms of pi PLS HELPP

stiv31 [10]

Answer: 105 or b

Step-by-step explanation: inner 256 and outer is 361 making the difference 105

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2 years ago