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Andreas93 [3]
1 year ago
13

(Please answer! :) )

Mathematics
1 answer:
Anna [14]1 year ago
6 0

Answer:

ok

Step-by-step explanation:

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Solve the inequality below for x. -3.2(2x-1) less than or equal to 17.6
zhenek [66]

- 3.2(2x - 1) \leqslant 17.6 \\  - 6.4x + 3.2 \leqslant 17.6 \\  - 6.4x \leqslant 14.4 \\ x \geqslant 2.25
3 0
3 years ago
Solve the equations by factoring:<br><br>x^2−3x−40=0<br><br>4x^2−81=0
Alja [10]

Answer:

see explanation

Step-by-step explanation:

Given

x² - 3x - 40 = 0

Consider the factors of the constant term (- 40) which sum to give the coefficient of the x- term (- 3)

The factors are - 8 and + 5, since

- 8 × 5 = - 40 and - 8 + 5 = - 3, thus

(x - 8)(x + 5) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 8 = 0 ⇒ x = 8

x + 5 = 0 ⇒ x = 5

------------------------------------------------------

Given

4x² - 81 = 0 ← this is a difference of squares and factors in general as

a² - b² = (a + b)(a - b), thus

4x² - 81

=(2x)² - 9²

= (2x + 9)(2x - 9) = 0 ← in factored form

Equate each factor to zero and solve for x

2x + 9 = 0 ⇒ 2x = - 9 ⇒ x = - \frac{9}{2}

2x - 9 = 0 ⇒ 2x = 9 ⇒ x = \frac{9}{2}

8 0
3 years ago
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Between which two tens does 384 fall
aalyn [17]
384 is between 380 and 390
7 0
3 years ago
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Can a polygon have for it faces 3 triangles . explain
AVprozaik [17]

Answer:

Can a polyhedron have for its faces 3 triangles? A polyhedron is bounded by four or more than four polygonal faces. No, it is not possible that a polyhedron has 3 triangles for its faces.

Step-by-step explanation:

Please mark as brainliest

6 0
3 years ago
Please help ASAP<br> Algebra 2<br> (the answer is a x and y equation)
Ratling [72]

Answer:

(2, 8)

Step-by-step explanation:

A hole occurs when the denominator is equal to 0. In this case, the denominator equals zero when x = 2.

Next, we must find the value of y by factoring the numerator and simplifying:\frac{x^{2} +4x-12}{x-2} = \frac{(x-2)(x+6)}{x-2} = x+6

Then plug in 2 for x:

2 + 6 = 8.

Therefore, there is a hole at (2, 8)

4 0
3 years ago
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