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Fiesta28 [93]
4 years ago
9

Need help finding the value of X

Mathematics
1 answer:
aksik [14]4 years ago
4 0
I hope this helps you

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Daniel has read 10% of a book . he has36 more pages to finish . how many pages are in the book
Alla [95]

Answer:

40

Step-by-step explanation:

He has read 10% and has 90% left which is 36 pages

90% is 36

10%is 4

total number of pages is 100% which is 36+4 which is 40 pages

8 0
3 years ago
1. What is the value of x in the equation –6 + x = –2?
IgorC [24]
1. A. Add 6 to both sides to solve. 

2. D. If you simplify the a terms you will get 6 = 7 which is never true. 

3. A. Subtract 1.2m from both sides and then divide to solve. 

4. B. If you simplify you get 7 = 7 which is always true. 

5. D. Distribute the 2 and then add the 24 to both sides. Then divide to solve. 

6. A. Simplify the right side and then divide all by two. Then add 16 to both sides and divide by 4. 

7. 3y - 2
8 0
4 years ago
Is this correct btw I put 1400​
Oxana [17]

Answer: Yes

Step-by-step explanation: The answer of 1400 is correct.

What I did is I found the area of the figure assuming it was a rectangle, then I subtracted the corners that were removed.

1800 - 150 - 100 - 150 = 1400

5 0
3 years ago
Read 2 more answers
Anne and Kyleigh worked over summer vacation.
juin [17]
Kyleigh earned more money than Anne
7 0
3 years ago
Find a cubic polynomial that goes through points (4, – 22) and (3, - 26) and has tangents with slopes
Salsk061 [2.6K]

Let <em>f(x)</em> = <em>ax</em> ³ + <em>bx</em> ² + <em>cx</em> + <em>d</em>.

The graph of <em>f(x)</em> passes through (4, -22) and (3, -26), which means <em>f</em> (4) = -22 and <em>f</em> (3) = -26, so that

64<em>a</em> + 16<em>b</em> + 4<em>c</em> + <em>d</em> = -22

27<em>a</em> + 9<em>b</em> + 3<em>c</em> + <em>d</em> = -26

When the question says it has tangents at some point, I take that to mean the slope of the tangent line at that point is the given number. So <em>f '</em> (4) = 11 and <em>f '</em> (3) = -2. We have

<em>f '(x)</em> = 3<em>ax</em> ²+ 2<em>bx</em> + <em>c</em>

so that

48<em>a </em>+ 8<em>b </em>+ <em>c</em> = 11

27<em>a </em>+ 6<em>b</em> + <em>c</em> = -2

Solve the system:

• Eliminate <em>d</em> :

(64<em>a</em> + 16<em>b</em> + 4<em>c</em> + <em>d</em>) - (27<em>a</em> + 9<em>b</em> + 3<em>c</em> + <em>d</em>) = -22 - (-26)

→   37<em>a</em> + 7<em>b</em> + <em>c</em> = 4

• Eliminate <em>c</em> :

(48<em>a </em>+ 8<em>b </em>+ <em>c</em>) - (27<em>a </em>+ 6<em>b</em> + <em>c</em>) = 11 - (-2)

→   21<em>a</em> + 2<em>b</em> = 13

(48<em>a </em>+ 8<em>b </em>+ <em>c</em>) - (37<em>a</em> + 7<em>b</em> + <em>c</em>) = 11 - 4

→   11<em>a</em> + <em>b</em> = 7

• Eliminate <em>b</em>, then solve for <em>a</em> and the other variables:

(21<em>a</em> + 2<em>b</em>) - 2 (11<em>a</em> + <em>b</em>) = 13 - 2 (7)

-<em>a</em> = -1

<em>a</em> = 1   →   <em>b</em> = -4   →   <em>c</em> = -5   →   <em>d</em> = -2

Then

<em>f(x)</em> = <em>x</em> ³ - 4<em>x</em> ² - 5<em>x</em> - 2

7 0
4 years ago
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