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timurjin [86]
3 years ago
5

Tomorrow than 4 times a number is -18

Mathematics
1 answer:
Law Incorporation [45]3 years ago
7 0

Answer: -5

Step-by-step explanation:

im going to assume tomorrow means Two more.....

2+4x=-18

brilliant.

lets do opposite calculations to both sides. what is the opposite of 2? negative 2. so lets subtract 2 from both sides.

we get

4x=-20

ok so now we have 4 times x. what is the opposite of this? 4 DIVIDED BY x.

ok now lets do the same to the other side. what is negative 20 divided by 4?

x=-5

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Draw the solution for 4(2+10) when using the distributive<br> property.
In-s [12.5K]
It would be 8 + 40 because you multiply the 4 by the 2 and 10
8 0
3 years ago
A projectile is launched from the ground at an angle of theta above the horizontal with an initial speed of v in​ ft/s. The rang
VARVARA [1.3K]

Answer:

\theta=24.4^\circ

Step-by-step explanation:

The formula you wrote has the fraction the other way around. You can find that the range​ of a projectile is in reality approximated by the equation x=\frac{v^2}{g} sin(2\theta)=\frac{v^2}{32ft/s^2} sin(2\theta), where we will use ft for distances.

From the given equation we have then \frac{x32ft/s^2}{v^2} =sin(2\theta), which means \theta=\frac{Arcsin(\frac{x32ft/s^2}{v^2})}{2} since the arcsin is the inverse function of the sin.

Since we have x = 170 ft and  v = 85 ft/s, we can substitute these values from the equation written, and we will have \theta=\frac{Arcsin(\frac{(170ft)(32ft/s^2)}{(85ft/s)^2})}{2}, and from now on we have just to use a calculator, obtaining \theta=\frac{Arcsin(0.75294117647)}{2}=\frac{48.84579804^\circ}{2}=24.4^\circ

3 0
3 years ago
Find the area of a triangle where the base is 3 3/4 in and the height is 4 inches.
sergeinik [125]
A=30
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8 0
3 years ago
Which of the following would produce a standard error of 2 points? n = 5 scores from a population with σ = 20 n = 5 scores from
baherus [9]

Answer:

n = 100 scores from a population with σ = 20

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation, which is also called standard error, of s = \frac{\sigma}{\sqrt{n}}

n = 5 scores from a population with σ = 20

s = \frac{20}{\sqrt{5}} = 8.94

n = 5 scores from a population with σ = 80

s = \frac{80}{\sqrt{5}} = 35.78

n = 100 scores from a population with σ = 20

s = \frac{20}{\sqrt{100}} = 2.

This one is the correct answer.

n = 100 scores from a population with σ = 40

s = \frac{40}{\sqrt{100}} = 4.

3 0
3 years ago
SOLVE FOR A PLZ HELP MEE
Bad White [126]

Answer:

The equation is equal to each other it ends up simplifying to

8a-39=8a-39

they are both equal to each other but if you simplify it even more thye undo each other so it becomes

0=0

Step-by-step explanation:

7 0
3 years ago
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