3 years ago

Simplify the following by combining like terms: -5- x+4x - 4

Mathematics

1 answer:

Paha777 [63]3 years ago

3 0

This expression simplified is 3x-9. This is solved by combining like terms.

-x + 4x = 3x
-5 - 4 = -9

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Identify the property’s that justifies the statement: If 4x-3=7, then 4x=10

Alenkasestr [34]

Answer:

Step-by-step explanation:

The equation shown above does not show the substitution property. Instead, it shows the Addition Property of Equation where 3 is added to both of its sides. This is shown below,

4x - 3 = 7

4x - 3 + 3 = 7 + 3

4x = 10

4 0

4 years ago

Find what the question asks. 200 points. Will mark brainleist

kotegsom [21]

Note:
The area of a circle with radius r is πr².
An entire circle has a central angle of 360°.

For the sector with radius = (3+4) = 7cm and a central angle of 120°, the area is
$A_{1}= \frac{120}{360}*(49 \pi ) = \frac{49}{3} \pi \, cm^{2}$

For the sector with radius = 3 cm and a central angle of 120°. the area is
$A_{2}= \frac{120}{360} *(9 \pi ) = 3 \pi \, cm^{2}$

The area of the shaded sector (see the figure) is
$A=A_{1}-A_{2} = ( \frac{49}{3} -3) \pi = \frac{40}{3} \pi \, cm^{2}$

Answer: $\frac{40}{3} \pi \, cm^{2}$