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Hunter-Best [27]
3 years ago
13

7p-(3p+4)= -2 (2p-1)+10

Mathematics
1 answer:
Schach [20]3 years ago
5 0
7p ( -3p +4) = -2 ( 2p - 1) + 10

so ima do one part first okay.

7p x -3p = -21p

7p x 4 = 28p

so now we put it as a equation. so you have now
-21p +28p = -2 (2p -1) +10

so ima do the second part.
-2 x 2p = -4p
2 x 1 = 2

so now you have -21p + 28p = -4p + 2 + 10

so im going to put all like terms together.

28p - 21p = 7p

7p = -4p + 2 + 10
<u>+4p  +4p</u>

11p = 2 + 10
 
<u> 11p = 12    </u>             
         11 

p = 12/11 *it's your answer

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3 years ago
What property is this in math 6+(4+x)=(6+4)+x
dimaraw [331]

Answer:

Associative Property of Addition

Step-by-step explanation:

When you add, you can group the numbers in any combination.

7 0
3 years ago
Solve for x.<br>4 - 3x= 2x+9<br>​
AlekseyPX

Answer:

-1

Step-by-step explanation                                                                                                   4 - 3x= 2x+9

​take x in a side and the numbers in the other side                                                    then 4-9=2x+3x................-5=5x.....x=-1

6 0
3 years ago
Five years ago, Tim’s mom was three times Tim’s age today. Now their combined ages are 45. How old is Tim’s mom today?
Shalnov [3]
To solve this problem, you must name a variable, create expressions representing the parts of the problem, and then set up an equation.

Let Tim's age today be t. Since Tim's mom's age five years ago was 3 times Tim's current age, Tim's mom's current age is equal to 3t + 5.
Their ages are collectively 45, so Tim's age t and Tim's mom's age 3t + 5 must be equal to 45. Set up an equation and solve for the variable t.

45 = t + (3t + 5)
45 = t + 3t + 5
45 = 4t + 5
40 = 4t
10 = t

Tim is currently 10, and after plugging 10 for t into 3t + 5, we see that Tim's mom is 35.

Now let's check our work. Their combined ages are 45; 10 plus 35 is equal to 45, so that is correct. Further, addressing the "Five years ago, Tim's mom was three times Tim's age today" bit, we see that 10 - Tim's current age - times 3 is equal to 30, which would be Tim's mom's age 5 years ago.

Answer:
Today, Tim's mom is 35.
8 0
3 years ago
Consider the function f(x) = x² – 3x – 4 and complete parts (a) through (C). (a) Find f(a+h); f(a+h)-f(a) (b) Find (c) Find the
Artist 52 [7]

Answer:

(a)

f(a+h)=a^{2} +2ah+h^{2} -3a-3h-4

(b)

f(a+h)-f(a)=2ah+h^{2} -3h

(c)

\frac{df(a+h)}{dx} \left \{ { \atop {a=7}} \right. =2h+11

Step-by-step explanation:

(a)

Simply evaluate (a+h) in the function:

f(a+h)=(a+h)^{2} -3(a+h)-4=a^{2} +2ah+h^{2} -3a-3h-4

(b)

Evaluate (a) in the function:

f(a)=a^{2} -3a-4

Using the previous answers lets calculate f(a+h)-f(a)

f(a+h)-f(a)=a^{2} +2ah+h^{2} -3a-3h-4-(a^{2} -3a-4)=2ah+h^{2} -3h

(c) To find the rate of change of f(a+1) when a=7 we need to calculate its derivate at that point:

\frac{df(a+h)}{dx} \left \{ { \atop {a=7}} \right. =2a+2h-3=2(7)+2h-3=2h+14-3=2h+11

7 0
4 years ago
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