Answer:
The null hypothesis would say that class size has no effect on students learning.
Step-by-step explanation:
Null hypothesis is a type of hypothesis that is used in statistics which proposes that there is no difference between a certain characteristic of a population or the data - generating process.
Now, in this question,the school district is considering increasing class size in the elementary schools but we want to check whether larger classes may have a negative effect on students learning.
Thus, the null hypothesis would reject this claim of larger classes having negative effect on students and say that class size has no effect on students learning.
Answer:
81
Step-by-step explanation:
We have to solve the following multiplication: (−27) (5−8)
First, we are going to simplify the second parenthesis, before performing the multiplication:
(−27) (5−8) = (−27)(-3) = 81.
The result is positive given that minus times minus equals plus.
Answer:
2184 different skateboards can Bruno create
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Step-by-step explanation:
The skateboard store has 3 types of grip tape, 13 types of decks, 7 types of trucks, 4 types of bearings, and 2 types of wheels.
AS skateboard will contain only one type of each component.
So, the number of skateboards can Bruno create =
= 3 * 13 * 7 * 4 * 2 = 2184 skateboards.
we have used the Multiplication Rule to find the outcomes from 5 independent types.
Step-by-step explanation:
9(-7 + 6) = 9(-7) + 9(6)
Hope it help !
Answer:
(6, 3)
General Formulas and Concepts:
<u>Pre-Alg</u>
- Order of Operations: BPEMDAS
<u>Alg I</u>
- Solving systems of equations using substitution/elimination
Step-by-step explanation:
<u>Step 1: Define systems</u>
4x = 8y
2x + 5y = 27
<u>Step 2: Rewrite systems</u>
x = 2y
2x + 5y = 27
<u>Step 3: Solve for </u><em><u>y</u></em>
- Substitute: 2(2y) + 5y = 27
- Multiply: 4y + 5y = 27
- Combine like terms: 9y = 27
- Isolate <em>y</em>: y = 3
<u>Step 4: Solve for </u><em><u>x</u></em>
<em>Plug in y into an original equation to find x.</em>
- Substitute: 4x = 8(3)
- Multiply: 4x = 24
- Isolate <em>x</em>: x = 6
