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3 years ago

9

What is the answer to 2 2/3 + 4 3/4 equals

2 answers:

madam [21]3 years ago

8 0

Answer:

7 5/12

Step-by-step explanation:

2 2/3 + 4 3/4 = 8/3 + 19/4 = 32/12 + 57/12 = 89 / 12 = 7 5/12

Harlamova29_29 [7]3 years ago

6 0

Answer:

$7\frac{5}{12}$

2+4=6

$\frac{2}{3} + \frac{3}{4} =?$

The LCD of 2/3 and 3/4 is 12 so

$\frac{8}{12} + \frac{9}{12} = \frac{17}{12}$

Simplify 17/12

$\frac{17}{12} = 1\frac{5}{12}$

Combine the whole and fraction parts

6+1+ $\frac{5}{12} = 7\frac{5}{12}$

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What is the vertex of the graph of this equation y= -4x^2-16x-12

Lisa [10]

One way to locate the vertex is to obtain the coefficients a, b and c from the quadratic and then calculate
-(-16)
x = -b / (2a). Here, x = ---------- = -2
2(-4)

Next, evaluate y at x = -2: y = -4(-2)^2 - 16(-2) - 12 = -16 + 32 - 12
y = 4

the vertex is at (-2,4).

4 0

3 years ago

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Solve by elimination x-5y=35 and 3x-6y=51

IrinaVladis [17]

Answer: x=5 y=-6

(5,-6)

Step-by-step explanation:

Solve by elimination

$\begin{bmatrix}x-5y=35\\ 3x-6y=51\end{bmatrix}$

multiply x-5y=35 by 3

= 3x-15y=105

$\begin{bmatrix}3x-15y=105\\ 3x-6y=51\end{bmatrix}$

$3x-6y=51$

- $\underline{3x-15y=105}$

$9y=-54$

divide 9 on both sides

y= -6

Now solve for x

you must plug in -6 for y in either equations

i plugged in -6 for y in 3x-15y=105

$3x-15\left(-6\right)=105$

$3x+15\cdot \:6=105$

$15\cdot \:6=90$

$3x+90=105$

subtract 90 on both sides

$3x=15$

$\frac{3x}{3}=\frac{15}{3}$

$x=5$

Please mark brainliest

3 0

4 years ago

Read 2 more answers

Factor completely: 2x4 − 32.

vazorg [7]

Answer:

Option b) is correct.

The completed factor of given expression is $2(x-2)(x+2)(x^2+4)$

Step-by-step explanation:

Given expression is $2x^4-32$

To find the completed factor for the given expression:

$2x^4-32$ :

Taking the common number "2" outside to the above expression we get

$2x^4-32=2(x^4-16)$

Now rewritting the above expression as below

$=2(x^4-2^4)$ (since 16 can be written as the number 2 to the power of 4)

$=2((x^2)^2-(2^2)^2)$

The above expression is of the form $a^2-b^2=(a+b)(a-b)$

Here $a=x^2$ and $b=2^2$

Therefore it becomes

$=2(x^2+2^2)(x^2-2^2)$

$=2(x^2+4)(x^2-2^2)$

The above expression is of the form $a^2-b^2=(a+b)(a-b)$

Here $a=x$ and $b=2$

Therefore it becomes

$=2(x^2+4)(x+2)(x-2)$

$=2(x+2)(x-2)(x^2+4)$

Therefore $=2(x+2)(x-2)(x^2+4)$

$2x^4-32=2(x-2)(x+2)(x^2+4)$

Option b) is correct.

The completed factor of given expression is $2(x-2)(x+2)(x^2+4)$

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4 years ago

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-50 1/2 +[-12.3] simplify expression

ololo11 [35]

Answer:

-62.8

Step-by-step explanation:

$-50 \frac{1}{2} - 12.3$
$-50.5 - 12.3$
$-62.8$

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3 years ago

What best describes the relationship between the lines with equations y=3x+2y=3x+2 and y=−2x+14y=−2x+14?

Luda [366]

They both intercept at a single point, in a consistent system.

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3 years ago