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sineoko [7]
2 years ago
14

Solve the system of equations by adding them together term by term to eliminate one variable:

Mathematics
1 answer:
Ber [7]2 years ago
3 0
It is 4 pennies and 20 quaters
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Experiments on learning in animals sometimes measure how long it takes mice to find their way through a maze. The mean time is 1
Dahasolnce [82]

Answer:

<h3>Option c) H_a:\mu is correct</h3><h3>The alternate hypothesis for the significance test is H_a:\mu</h3>

Step-by-step explanation:

The alternate hypothesis use the sumbol for the population value

Let p be the proportion , Mean be \mu and stadard deviation be \sigma

The null hypothesis states that population value is equal to the value mentioned in the given claim.

H_0:\mu=18 (by given).

The alternate hypothesis for the significance test states that the opposite of the null hypothesis(based on the claim )

∴ H_a:\mu

The symbol "<" because we want to test if the maze is completed faster and thus if the time has decreased.

<h3>∴ option c) H_a:\mu is correct.</h3>
3 0
3 years ago
If 60 marks is 40% what is the full marks
alina1380 [7]

Let the full marks = x

Then, it would be: x*40/100 = 60

x = 6000/40

x = 150

Full marks will be 150

8 0
3 years ago
Read 2 more answers
PLEASE HELP!!!
lianna [129]
What ???? How are we supposed to understand tht
8 0
2 years ago
El volumen de un cubo, cuyos lados miden 4,5 cm corresponde a: A- 91 cm2 B- 91,1 cm C- 91 cm3
Leya [2.2K]

Answer:

La respuesta correcta es la opción C: 91 cm³.

Step-by-step explanation:

La fórmula del volumen de un cubo es la siguiente:

V = a^{3}

En dónde:

a: es cada lado del cubo = 4,5 cm

Entonces, el volumen del cubo es:

V = a^{3} = (4,5 cm)^{3} = 91.1 cm^{3} \approx 91 cm^{3}

Por lo tanto, la respuesta correcta es la opción C: 91 cm³.  

Espero que te sea de utilidad!

6 0
3 years ago
What percent of 42 is 30? In proper fraction
olga55 [171]
The answer is 500/7
Hope this helps

6 0
3 years ago
Read 2 more answers
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