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frez [133]
3 years ago
11

(2a+b)² -(3a+4b)(2a+7b)​

Mathematics
1 answer:
BabaBlast [244]3 years ago
7 0
-2a^2 - 25ab - 27b^2

hope this helps :)
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Which function is graphed on the right?
Norma-Jean [14]

Answer: y=2^{x-2}+3

Step-by-step explanation:

To find the equation from a graphed function, you can substitute points into each equation to find the original:

A point on the graph is (2, 4). Substituting this into each equation, we get:

4=2^{2+3} -2, which claims that 4 is equal to 30, which is incorrect.

4=2^{2-3} +2, which claims that 4 is equal to 3/2, which is incorrect.

4=2^{2-2}+3, which claims that 4 is equal to 4, which is correct.

We can test the third function further by taking another point on the graph, (3, 5), and substituting it into the function:

5=2^{3-2} +3, which claims that 5 is equal to 5, which is correct.

3 0
3 years ago
mrs.jackson gives the table below to her students in order for the function to be linear what must m be and why?​
Hunter-Best [27]

M or the slope has to be constant throughout the graph. This is because in order for a line to be linear it has to be increasing or decreasing at the same rate. So it the slope was 2 from point x 1 -2 then the slope changed to 1 from 3-4 it would not be linear. :)

7 0
3 years ago
Write the number in two other forms 8.517
tamaranim1 [39]
Expanded: 8.000 + .500 + .010 + .007

Word Form: eight ones, five tenths, one hundredth, seven thousandths

Hope this helps!


3 0
3 years ago
A shop has a 3 for 2 offer on chocolate bars The normal price of a chocolate bar is 72p Sian gets 3 chocolate bars from the shop
Agata [3.3K]

Answer:

1.44 pounds

Step-by-step explanation:

From the above question, we are told that:

The shop has 3 for 2 offer on chocolate bars going on .This means a customer can buy 2 chocolates get 1 free, for the price of 2 chocolates, a customer can get 3 chocolates.

If the price of 1 chocolate bar = 72p

2 chocolate bars =

72p × 2

= 144p

Hence, Sian spends 144p

We are asked to convert our answer to pounds

The symbol p represent pence in money form

Hence,

100p(pence) = 1 pound

144p(pence) = x

100p × x = 144p × 1

x = 144p/100p

x = 1.44 pounds

Therefore, Sian spends 1.44 pounds

7 0
3 years ago
Deepak wrote out the steps to his solution of the equation StartFraction 5 Over 2 minus 3 x minus 5 plus 4 x equals negative Sta
Anna35 [415]

Answer:

Step 1 is incorrect.

Step-by-step explanation:

The given expression is :

\dfrac{5}{2}-3x-5+4x=\dfrac{-7}{4}

In step 1, Deepak rearranged the terms in order to simplify like terms together that is followed in step 2.

o, rearranging of the terms of an expression is commutative property and not distributive property.  The distributive property is generally applicable to multiplication and is given as:

x(y+z)=xy+yz

The commutative property is given as:

x+y = y +a

Therefore, adding terms by changing their order is commutative property of addition and not distributive property. Step 1 instruction is wrong.

6 0
3 years ago
Read 2 more answers
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