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iVinArrow [24]
3 years ago
9

PLEASEEE HELPP MEE WITH QUESTIONSSS 7 AND 8 QUESTION: (IN BOLDED SHOWN IN THE PICTURE)

Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
5 0

Answer:

hi dont report me we are friends can i get brainliest plzz?

Step-by-step explanation:

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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
1 year ago
S||P FIND VALUE OF Z !
NNADVOKAT [17]

Answer:

Step-by-step explanation:

Please excuse my handwriting lol.

7 0
3 years ago
Three times the sum of four and a number is twice the number.
Anon25 [30]

Answer:

24

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Salena, Justin, and Brandon were riding their bikes to the library after school. The library is 12 1/2 miles from school. Salena
faust18 [17]

Answer:

Salena's got to the library first

Step-by-step explanation:

12½ miles = 25/2 miles

2½ miles = 5/2 miles

5¾ miles = 23/4 miles

114 miles = 114 miles

Salena's time of arrival =

if 5/2 miles : 5 minutes

then 25/2 miles : ?

25/2 ÷ 5/2. × 5

25/2 × 2/5 × 5

25 minutes

Justin 's time of arrival=

if 23/4 miles : 12 minutes

25/2 miles : ?

25/2 ÷ 23/4 ×12

25/2 × 4/23 ×12

26 minutes approximately

Brandon 's time of arrival=

if 114 miles : 258 minutes

25/2 miles : ?

25/2 ÷114 ×258

25/2 × 1/114×258

25 × 1/57 × 258

113 minutes approximately

3 0
3 years ago
I need help <br> Solve for a<br> a+b=c
antiseptic1488 [7]

Step-by-step explanation:

What is it that you need help with exactly?

A+B=C

It's already been solved. Do you need it in a different form?

(a/(b/c)

7 0
2 years ago
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