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Hatshy [7]
3 years ago
6

Add. (2x + 5) + (3x - 7) A) x - 2 B) x + 2 C) 5x - 2 D) 5x + 2

Mathematics
2 answers:
MrRissso [65]3 years ago
8 0
5x - 2. Just combine like terms, and distribute the + to the second term. 
iVinArrow [24]3 years ago
8 0

Answer:

C) 5x - 2

Step-by-step explanation:

When parentheses are preceded by a + sign, they may be immediately removed. Two additions and one subtraction are called for here: 2x + 5 + 3x - 7. This is 5x - 2.

(2x + 5) + (3x - 7)

2x + 5 + 3x - 7

2x + 3x - 7 + 5

<u>5x - 2</u>.

<h2>Hope this helps!!!</h2>
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Answer:

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Step-by-step explanation: divide 1 by 18.

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The length of a concrete slab is three more than three times the width. It's area is 330 square feet. What is the length of the
marin [14]

Answer:

Width: 10.5 feet

Length: 31.5 feet

Step-by-step explanation:

Let x represent width of the concrete slab.

We have been given that the length of a concrete slab is three more than three times the width. So length of the slab would be 3x.

We are also told that the area of slab is 330 square feet. We can represent this information in an equation as:

x\cdot 3x=330

3x^2=330

x^2=\frac{330}{3}

x^2=110

Now, we will take square root of both sides.

\sqrt{x^2}=\sqrt{110}

x=10.488\approx 10.5

Therefore, the width of slab is approximately 10.5 feet.

The length of the slab would be 3x\Rightarrow3(10.5)=31.5.

Therefore, the length of slab is approximately 31.5 feet.

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F(6)=2^6 what does f equal?
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Find the GCF of 49 and 63
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The vertex of the parabola below is at the point (3,2) and the point (4,6) is on the parabola. What is the equation of the parab
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Answer:

\large\boxed{y=4(x-3)^2+2\ \bold{vertex\ form}}\\\boxed{y=4x^2-24x+38\ \bold{standard\ form}}

Step-by-step explanation:

The vertex form of a parabola:

y=a(x-h)^2+k

(h, k) - vertex

We have the vertex at (3, 2) → h = 3 and k = 2.

Substitute:

y=a(x-3)^2+2

The point (4, 6) is on athe parabola. Put the coordinates of this point to the equation:

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6-2=a(1)^2+2-2

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Finally:

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<em>use (a - b)² = a² - 2ab + b²</em>

y=4(x^2-6x+9)+2          <em>use the distributive property</em>

y=4x^2-24x+36+2

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