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Elina [12.6K]
3 years ago
11

Please I really need it ASAP!I'll give you brainliest! please...!!!!

Mathematics
1 answer:
nignag [31]3 years ago
3 0

Answer:

5x+2 = 2x+17

=> 5x-2x = 17-2

=> 3x = 15

=> x = 15/3

=> x = 5

thats my answere

brainlieat me!!!thankyou

#keepitup

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Find the values of m and b that make the following function differentiable.
KengaRu [80]

f(x)=\begin{cases}x^2&\text{for }x\le2\\mx+b&\text{for }x>2\end{cases}

In order to be differentiable everywhere, f must first be continuous everywhere, which means the limits from either side as x\to2 must be the same and equal to f(2). By definition, f(2)=2^2=4, and

\displaystyle\lim_{x\to2^-}f(x)=\lim_{x\to2}x^2=4

\displaystyle\lim_{x\to2^+}f(x)=\lim_{x\to2}(mx+b)=2m+b

so we need to have 4m+b=4.

For f to be differentiable at x=2, the derivative needs to be continuous at x=2, i.e.

\displaystyle\lim_{x\to2^-}f'(x)=\lim_{x\to2^+}f'(x)

We then need to have

\displaystyle\lim_{x\to2}2x=\lim_{x\to2}m\implies\boxed{m=4}

Then

2m+b=4\implies\boxed{b=-4}

7 0
3 years ago
Morris has 2 3/4 gallons of ice tea. He gives 3/7 of it to her friend. How many gallons of ice tea does Morris have left?
lara31 [8.8K]

Answer:

2 \frac{9}{28} gallons of ice tea is left with Morris

Step-by-step explanation:

Morris has 2 3/4 gallons of ice tea. He gives 3/7 of it to her friend.

Morris has 2 3/4 gallons of ice tea

2\frac{3}{4}= \frac{2*4+3}{4}=\frac{11}{4}

He gives 3/7 of it to her friend.

To find how many gallons of ice tea does Morris have left , we subtract 3/7 from 11/4

\frac{11}{4}- \frac{3}{7}

Make the denominators same

\frac{11*7}{4*7}- \frac{3*4}{7*4}

\frac{77}{28}- \frac{12}{28}

\frac{65}{28}

\frac{65}{28} = 2 \frac{9}{28}

7 0
3 years ago
A chocolate chip cookie recipe that makes 24 cookies uses 3/4 cups of sugar. if raphael wants to make 48 cookies, how much sugar
ladessa [460]

1.5 cups

Step-by-step explanation:

3x2=6

4 goes into 6 once and leaves 2 which is half of 4

8 0
3 years ago
Read 2 more answers
BRAINLIEST AND HIGH POINTS :D
castortr0y [4]

Answer:

A) (2x+15)=65=180°

Step-by-step explanation:

Hey there!

It's a straight line, which means that the sum will be 180°.

So, (2x+15)=65=180°

~

Hope this helps!

6 0
2 years ago
Read 2 more answers
Find the length of the arc.
Bezzdna [24]

Answer:

18.84 ft

Step-by-step explanation:

¼×2×3.14×12 = 18.84 ft

5 0
3 years ago
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