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2 years ago

The most inner parenthetical term confuses me... 5+2 [10 (5•3-10)-30] =

1 answer:

6 0

5 + 2[ 10( 5 · 3 – 10 ) <span>– 30 </span>]

= 5 + 2[ 10( 15 – 10 ) – 30 ]

= 5 + 2[ 10( 5 ) – 30 ]

= 5 + 2[ 50 – 30 ]

= 5 + 2[ 20 ]

= 5 + 40

= 45 <——<span>— this is the answer.</span>

I hope this helps. =)

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∡C and ∡D are supplementary angles. If m∡D is nine less than twice m∡C, find m∡D.

Gala2k [10]

Answer:

D is 117

Step-by-step explanation:

Let the measure of angle C be x

The measure of D is 9 less than twice C

Mathematically that is 2x-9

If both are supplementary, they add up to be 180

Thus;

x + 2x - 9 = 180

3x = 180 + 9

x = 189/3

x = 63

Recall;

D = 2x-9= 2(63) -9 = 126 -9 = 117

6 0

2 years ago

You were given the polynomial f(x)=3x^3+13x^2+19x+k and you know that f(-2)=0find k

eduard

Answer:

k = 10

Explanation:

The initial polynomial is:

$f(x)=3x^3+13x^2+19x+k$

If f(-2) = 0, then when we replace x by -2, the result will be 0. It means that we can write the following equation:

$\begin{gathered} f(-2)=3(-2)^3+13(-2)^2+19(-2)+k=0 \\ 3(-2)^3+13(-2)^2+19(-2)+k=0 \end{gathered}$

Therefore, we can solve for k as follows:

$\begin{gathered} 3(-8)+13(4)+19(-2)+k=0 \\ -24+52-38+k=0 \\ -10+k=0 \\ -10+k+10=0+10 \\ k=10 \end{gathered}$

So, the value of k is 10

6 0

9 months ago

3.75 written as a word

tigry1 [53]

Three and seventy five hundredths............Hope I Helped! PS: I am a Middle Schooler and I know this!

7 0

3 years ago

Consider the diagram. Lines a and d are?

marta [7]

Answer:

perpendicular

Step-by-step explanation:

They form a 90 degree angle

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2 years ago

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Bezzdna [24]

100

0.1

Are you have to do is look at the number very closely

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2 years ago