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sammy [17]
3 years ago
13

Which two numbers are 7.5 units away from 0 on a number line?

Mathematics
2 answers:
Mice21 [21]3 years ago
6 0
The two numbers that are 7.5 units away from 0 on a number line are 7.5 and -7.5.
Wittaler [7]3 years ago
3 0
The two numbers are 7.5 and -7.5.
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HELP NEEEDED ASAP PLEASE!!!
Zielflug [23.3K]

Answer:

im pretty sure the answers are

A) 6

b) 10

4 0
4 years ago
2 trains leave from the same point and travel along straight tracks that differ in direction by 72゚. If their speeds are 64 mile
Alinara [238K]

Answer:

34.44 miles

Step-by-step explanation:

Distance covered bty the two trains :

Distance = speed * time

Time = 30 minutes = 0.5hr

Distance of train 1 = 64 * 0.5 = 32 miles

Distance of train 2 = 52 * 0.5 = 26 miles

Included Angle = 72°

Using cosine rule :

a² = b² + c² - 2bcCosA

Let Distance between the trains after 30 minutes = a

a^2 = 32^2 + 26^2 - 2(32)(26) * Cos(72)

a^2 = 1700 - 514.20427

a^2 = 1185.7957

a = sqrt(1185.7957)

a = 34.435

a = 34.44 miles

5 0
3 years ago
Is the following relation a function? <br><br> Yes<br> Or<br> No
WITCHER [35]
Yes, that relation is a function. It has no repeating x values
6 0
3 years ago
Read 2 more answers
The half-life of Radium-226 is 1590 years. If a sample contains 500 mg, how many mg will remain after 2000 years? Preview mg Giv
d1i1m1o1n [39]

Answer:

a_{n}=209.09 mg

Step-by-step explanation:

given: material= radium

half life= 1590 years

initial mass a_{0} =500mg

we know that to calculate the amount left we use

a_{n} = a_{0}\left ( 0.5\right )^{n}

n=\frac{2000}{1590} = 1.2578

therefore

a_{n} = 500\times0.5^{1.2578}

a_{n}=209.09058407921 mg

a_{n}=209.09 mg amount left after 2000 years

4 0
4 years ago
A number increased by 7 is 2 less than twice the number
Vedmedyk [2.9K]

n + 7 = 2n - 2

Add 2 to both sides:

n + 9 = 2n

Isolate n:

n = 9

4 0
3 years ago
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