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harkovskaia [24]
3 years ago
7

Look at the student work shown below.

Mathematics
1 answer:
EastWind [94]3 years ago
8 0
Hey there :)

4t ( 2s - 7 )
We need to apply what is called the distributive property.

The student did a mistake by not distributing 4t to both values inside the bracket
The distributive property is used to get rid of the parenthesis/bracket

The student's answer should be:
4t ( 2s ) + 4t ( - 7 )
8st - 28t

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I REALLY NEED HELP
Ede4ka [16]
There are 60 minutes in one hour, thus, 45 miles per hour is 45 miles per 60 minutes, thus

\bf \begin{array}{ccll}
miles&minutes\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
45&60\\
240&m
\end{array}\implies \cfrac{45}{240}=\cfrac{60}{m}\implies m=\cfrac{240\cdot 60}{45}
8 0
3 years ago
The area of a triangular piece of stained glass is 50 square centimeters. If the height (h) of the triangle is four times the ba
lyudmila [28]

Answer:

Height = 20 ; Base = 5

Step-by-step explanation:

Triangle Area = Base x Height x 1/2

50 = 1x × 4x × 1/2

50 = 4x^2 × 1/2

50 = 2x^2

25 = x^2

x=5

Height equals to 4x -> 4 × 5 = 20

Base equals to x -> 1 × 5 = 5

4 0
2 years ago
If the expression below has a positive value , which inequality represents all possible values of x in the expression?
SpyIntel [72]

for the expression to give a positive results then x just be a negative number

or zero

x<=0

7 0
3 years ago
No rush for a answer help is very much needed :))
dangina [55]

Answer:

16πa²b²c²

Step-by-step explanation:

r = 2abc

SA = 4πr²

= 4π x (2abc)²

= 4π x 4a²b²c²

= 16πa²b²c²

6 0
3 years ago
Read 2 more answers
what is the area of the polygon given below A.) 120 sq units B.) 180 sq units C.) 90 sq units D.) 60 sq units
SashulF [63]

Answer:

D

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
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