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3 years ago

Help me out not all just what you can

Mathematics

1 answer:

lara31 [8.8K]3 years ago

6 0

9514 1404 393

Answer:

1e. 2t² +8t -6

2h. a² +2ab -3b²

3b. 8r +4

4b. 6x +4y -11

5b. e -3

Step-by-step explanation:

1e. Combine like terms.

(3t² +3t -6) +(-t² +5t) = t²(3 -1) +t(3 +5) -6

= 2t² +8t -6

2h. (2a² +3ab -4b²) -(a² +ab -b²)

Use the distributive property to eliminate parentheses. Note that all signs change in the second set of parentheses.

= 2a² +3ab -4b² -a² -ab +b² = a²(2 -1) +ab(3 -1) +b²(-4+1)

= a² +2ab -3b²

3b. The hash marks indicate sides of the same length. The perimeter is the sum of all side lengths.

P = (4r -2) +2(2r +3)

P = 4r -2 +4r +6 . . . . . . eliminate parentheses

P = 8r +4 . . . . . . . . . . . . combine like terms

4b. (3x +4y) +(5x -8) -(2x +3)

Note that the distributive property changes the sign of all terms in the last parentheses.

= 3x +4y +5x -8 -2x -3 . . . . eliminate parentheses

= x(3+5-2) +y(4) +(-8-3) . . . group like terms

= 6x +4y -11

5b.

Bill's age - Erin's age = (2e-3) -(e) = e -3

The difference in their ages is (e -3).

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2 years ago

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How do you graph and translate a shape

jeka94

See in the explanation

<h2>Explanation:</h2>

Translating a shape is part of that we called Rigid Transformations. This is called like this because the basic form of the shape doesn't change. So this only changes the position of the chape in the coordinate plane. In mathematics, we have the following rigid transformations:

Horizontal shifts
Vertical shifts
Reflections

Horizontal and vertical shifts are part of translation. So the question is <em>How do we graph and translate a shape?</em>

To do so, you would need:

A coordinate plane.
An original shape
Set the original shape in the coordinate plane.
A rule
The translated shape

For example, the triangle below ABC is translated to form the triangle DEF. Here, we have a coordinate plana and an original shape, which is ΔABC. So this original shape has three vertices with coordinates:

A(-4,0)

B(-2, 0)

C(-2, 4)

The rule is <em>to translate the triangle 6 units to the right and 1 unit upward. </em>So we get the translated shape ΔDEF with vertices:

D(2,1)

E(4, 1)

F(4, 5)

<h2>Learn more:</h2>

Translation: brainly.com/question/12534603

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3 years ago

Dentify the percent, amount, and base in this problem. 75% of what number is 30?

anastassius [24]

Answer:

Step-by-step explanation:

This is essentially just (4/3), or $\frac{3}{4}^{-1}$ . (4/3)*30 = 40, so our answer must be 40. Just to check, taking 75 percent of 40, we indeed get 30!