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sineoko [7]
3 years ago
6

(-2x-1)-(x-7)???? HELLLPPPPP

Mathematics
1 answer:
Helen [10]3 years ago
3 0
Answer -3(x-2)

Explanation
-2x-1-(x-7)
-3-1+7
-3x+6
-3(x-2)
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What are two different strategies for finding the product of 472 and 33.
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4 0
3 years ago
Cdef maps to jklm with the transformation (x,y) to (4x,4y) to (x-4,y-9). What is the value of ef/lm.
Elina [12.6K]

Answer:

EF / LM = 1 / 4

Step-by-step explanation:

Transformation is the movement of a point from its initial location to a new location. Types of transformation are reflection, translation, dilation and rotation.

Dilation is the enlargement or reduction in the size of a figure. If a point A(x, y) is dilated by a scale factor of k, the new point is at A'(kx, ky).

Translation is the movement of a point right, left, up or down. If a point A(x, y) is translated a units left and b units down, the new point is at A'(x - a, y - b).

Translation preserves the size and shape of an object. Dilation preserves the shape but not the size.

Cdef maps to jklm with the transformation (x,y) to (4x,4y) to (x-4,y-9).

CDEF was first dilated by a scale factor of 4 to get (4x,4y) before it was translated by (x-4,y-9). Since dilation changes the size of the figure, hence JKLM would be 4 times the size of CDEF. Therefore:

LM / EF = 4

EF / LM = 1 / 4

6 0
3 years ago
On the last day of vacation, the Hernandez family drove 252 miles from a state park to their home. That drive covered 35% of the
aleksklad [387]

Answer:

  720 miles

Step-by-step explanation:

We are given a distance and a fraction of the total that it represents. This lets us write the relation ...

  252 = 0.35D . . . . . . where D is the total distance traveled

  252/0.35 = D = 720 . . . . divide by the coefficient of D

The Hernandez family traveled 720 miles during their vacation.

7 0
2 years ago
Giselle works as a carpenter and as a blacksmith.
Usimov [2.4K]

Answer:

34.5 hours as carpenter or 27.6 hours for blacksmith (Not sure about this sorry)

Step-by-step explanation:

690 ÷ 20 and 690 ÷ 25

8 0
4 years ago
Lia wants to estimate 4 1/7 x 3 3/5 To estimate, she simplifies the expression 4 x 3 1/2 .
Temka [501]
Given:
4 1/7 * 3 3/5

4 1/7 = (4*7)+1/7 = 29/7
3 3/5 = (3*5)+3/5 = 18/5

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Simplified expression.
4 x 3 1/2

3 1/2 = (3*2)+1/2 = 7/2

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It is a close estimate.   Actual: 14.91 vs Estimate: 14
6 0
3 years ago
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