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Tcecarenko [31]

1 year ago

5

Which expressions are equivalent to 78 • 7

1 answer:

marysya [2.9K]1 year ago

4 0

Question:

Which expressions are equivalent to 78 • 7? Select all that apply. A. 73 • 73 B. 71879 C. (73)3 D. 74 + 75 E. 74 • 75

None of the expressions are equivalent to 78 • 7

<u>What is an expression?</u>

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a complete sentence. Any one of the following mathematical operations can be used. A sentence has the following structure: Number/variable, Math Operator, Number/Variable is an expression.

None because 78 * 7 = 546

None of the options equal to 546.

To learn more about the expression from the given link

brainly.com/question/1859113

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E and F are mutually exclusive events. P(E)=0.3; P(F) =0.2. Find P(E | F)

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Step-by-step explanation:

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4 0

4 years ago

..vertex: (4, -1)<br> f(3) = -6

s344n2d4d5 [400]

Answer:

$\huge\boxed{f(x)=-5(x-4)^2-1=-5x^2+40x-81}$

Step-by-step explanation:

The vertex form of an equation of a parabola:

$f(x)=a(x-h)^2+k$

$(h;\ k)$ - vertex

We have

vertex $(4;\ -1)\to h=4;\ k=-1$

$f(3)=-6$

Therefore we have:

$f(x)=a(x-4)^2+(-1)=a(x-4)^2-1$

Substitute $x=3$ and $f(3)=-6$

$a(3-4)^2-1=-6\qquad|\text{add 1 to both sides}\\\\a(-1)^2=-6+1\\\\a(1)=-5\\\\a=-5$

Finally:

$f(x)=-5(x-4)^2-1=-5(x^2-2(x)(4)+4^2)-1\\\\=-5(x^2-8x+16)-1=-5x^2+(-5)(-8x)+(-5)(16)-1\\\\=-5x^2+40x-80-1=-5x^2+40x-81$

4 0

4 years ago