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Liula [17]
3 years ago
5

Expand and simplify (x+5)(x-2)

Mathematics
2 answers:
neonofarm [45]3 years ago
6 0

Answer:

{x}^{2}  + 3x  - 10

Step-by-step explanation:

(x + 5)(x - 2)

utilise the Foil method to expand brackets:

F - mulply the first terms (x and x)

O - multiply the outside terms ( x and -2)

I - multiply the inside terms (5 and x)

L - multiply the last terms (5 and -2)

Then add them as following:

{x}^{2}   - 2x + 5x - 10

Then combine like terms:

{x}^{2}  + 3x - 10

spin [16.1K]3 years ago
5 0

Answer:

x^2 + 3x + 10.

Step-by-step explanation:

(x+5)(x-2)

= x(x - 2) + 5(x - 2)

= x^2 - 2x + 5x - 10

= x^2 + 3x + 10.

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Will mark brainliest! Please help!
ValentinkaMS [17]

Answer:

The dimensions are:

3(2x+1) by (7x+5)

Step-by-step explanation:

The area of the rectangle is given as

A=42x^2+51x+15

The factored form of this quadratic trinomial gives the dimensions of the rectangle.

We factor 3 first to obtain;

A=3(14x^2+17x+5)

We split the middle term to get;

A=3(14x^2+10x+7x+5)

We factor within the parenthesis to get;

A=3(2x(7x+5)+1(7x+5))

We factor further to get;

A=3(2x+1)(7x+5)

The dimensions are:

3(2x+1) by (7x+5)

Then the perimeter will be

2(6x+3+7x+5)=26x+16\:\:\:\boxed{\sqrt{} }

4 0
3 years ago
PLEASE HELP i need help
Helen [10]

Answer:

9)

Domain {-2, -1, 1}

Range {-4, -2, 2, 4}

7)

Domain {0, 1, 2}

Range {-2, 0, 2, 3}

6)

Domian {-4, -1, 1, 2}

Range {-7, -4, 2}

8 0
3 years ago
In San Diego the average cost of gas is $4.15 per gallon. If a car has a fuel efficiency of 24 miles per gallon and the owner of
KIM [24]

Answer:

$25.94

Step-by-step explanation:

150 ÷ 24 = 6.25

6.25 × 4.15 = 25.9375

25.94

3 0
3 years ago
You are knitting a blanket. You want the area of the blanket to be 24 feet squared . You want the length of the blanket to be 2
Sauron [17]
Think of it this way: x multiplied by a number that is two more than x is y.
So, look at the factors. 3 and 8 wouldn't work, because 8 is 5 longer than 3. 1 and 24 wouldn't work, because 24 is 23 more than 1. 12 and 2 is also not going to work; 12 is 10 more than 2. What you have left is 4 and 6. 6 is 2 more than 4, and they both multiply to get 24.

So, the correct answer is 6 feet long and 4 feet wide.
4 0
3 years ago
Read 2 more answers
What is the surface area of the pyramid?​
xxMikexx [17]

Answer:

B.) 166

Step-by-step explanation:

10 x 2 = 20

12 x 10 = 120

13 x 2 = 26

20 + 120 + 26 = 166

8 0
3 years ago
Read 2 more answers
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