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kvasek [131]
3 years ago
14

What is this expression in simplified form? ​

Mathematics
1 answer:
Sphinxa [80]3 years ago
7 0
The expression simplified in form is answer : A
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To determine her power usage​, Keri divides up her day into three​ parts: morning,​ afternoon, and evening. She then measures he
marusya05 [52]

Answer:

Stratified Sampling

Step-by-step explanation:

Since Keri divides the day into different strata and each unit is selected from each strata randomly. So, it is Stratified Sampling.

Further, In Stratified Sampling population is divided into several groups such that within the group it is homogeneous and between the group it is heterogeneous. And now a selection of each stratum and unit has an equal chance of selection.

3 0
3 years ago
Plz help and show work plz
MrRa [10]

Answer:

3rd option

Step-by-step explanation:

The equation of a parabola in vertex form is

f(x) = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

Here (h, k ) = (- 1, - 25 ) , then

f(x) = (x - (- 1) )² - 25 , that is

     = (x + 1)² - 25 ← expand using FOIL

     = x² + 2x + 1 - 25

     = x² + 2x - 24

7 0
3 years ago
There were 160 people who voted at the town council meeting. Of these people, 30% voted for building a new basketball court in t
tatuchka [14]

Answer:

there are  a 112 against

Step-by-step explanation:30% of 160=48 ( 160*0.30=48)

160-48=112

6 0
2 years ago
If 12 pens cost 3.48 how much do 20 cost
VARVARA [1.3K]

Step-by-step explanation:

12/3.48= cost of 1 book

cost of 20 books = 12/3.48×20 =68.95

7 0
3 years ago
What would happen if a proton were added to the nucleus of the atom? (Check all
Hunter-Best [27]

Answer:

A. It would become a different atom.

C. Its charge would increase by 1

Step-by-step explanation:

Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. So, adding or removing protons from the nucleus changes what element that atom is! For example, adding a proton to the nucleus of an atom of hydrogen creates an atom of helium.

5 0
3 years ago
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