MATHEMATICS MIDDLE SCHOOL

What is the product (2x-1)(x+4)

Answers

Answer 1
Answer:

Answer:2x^2+7x-4.

Step-by-step explanation:

To find : The product of (2x-1)(x+4)

Using distributive property : a(b+c)=ab+ac , we have

(2x-1)(x+4)\n\n= (2x-1)x+(2x-1)4

Again , using distributive property : (b+c)a=ba+ca , we have

(2x-1)x+(2x-1)4=2x\cdot x+(-1)x+2x\cdot 4+(-1)4\n\n=2x^2-x+8x-4\n\n= 2x^2+7x-4

Hence, The product of (2x-1)(x+4) is 2x^2+7x-4.
Answer 2
Answer: 2x(x+4)-1(x+4)
2x^2+8x-x-4
2x^2+7x-4

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A cylinder is full at 471 cm3 and has a radius of 5 cm. It currently contains 314 cm3 of water. What will the difference in the height of the water be when the cylinder is full? Use 3.14 to approximate pi.

Answers

Volume of a cylinder = π r² h

fully filled w/ water:
471 cm³ = 3.14 * (5cm)² * h
471 cm³ = 3.14 * 25cm² * h
471 cm³ = 78.5 cm² * h
471 cm³ / 78.5 cm² = h
6 cm = h  

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314 cm³ = 78.5cm² * h
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Find the Difference 9,052-7,391

Answers

Here is the work below. Step 1. subtract the 2 and the 1. Step 2. since 5 is not enough to subtract by 9, we look at the next number next to the 5. We cannot borrow a zero, so we look to the left.We take one away from 9, make five into 15 and zero into 9. Step 3. subtract the rest.
1661 hope this helps hope i am brainliest i need it and btw you subtract with lining it up

What are the values of c makes x^2 + 6x + c a perfect square trinomial? 3
6
9
12

Answers

As per the given data, he value of c that makes x^2 + 6x + c a perfect square trinomial is c = 9.

What is trinomial?

A trinomial is a polynomial composed of three terms or monomials in elementary algebra.

To determine the value of c that makes x^2 + 6x + c a perfect square trinomial, we need to use the formula:

(a + b)^2 = a^2 + 2ab + b^2

In this case, we want to find two numbers a and b such that:

x^2 + 6x + c = (x + a)^2

Expanding the right-hand side, we get:

(x + a)^2 = x^2 + 2ax + a^2

Comparing the two expressions, we see that:

The linear coefficient of x is 2a

The constant term is a^2

Therefore, we need to find a number a such that 2a = 6 and a^2 = c. Solving for a, we get a = 3, and substituting into a^2 = c, we get c = 9.

Therefore, the value of c that makes x^2 + 6x + c a perfect square trinomial is c = 9.

For more details regarding trinomial, visit:

brainly.com/question/16347049

#SPJ7

Answer:

c = 9

Step-by-step explanation:

(a+b)^2=a^2+2ab+b^2\n\n\text{We have}\ x^2+6x+c=x^2+2(x)(3)+c\n\n\text{Therefore}\ c=3^2=9\n\nx^2+2(x)(3)+3^2=(x+3)^2

Please answer the question from the attachment.

Answers

15% means  0.15 .

'of' means 'times'.

The problem is      (0.15) x (63.2) .

I think you can take over and do it from there.

The length of s is 2/3 the length of t. If s has an area of 368 cm squared find the perimeter of the figure

Answers

Hi There! :)

The length of s is 2/3 the length of t. If s has an area of 368 cm squared find the perimeter of the figure

920
the correct answer is 920 hope this helps 

Simplify the expression: 3a + 4 + b + 2a +5 + b AnswerChoice A.5a+b B.6a+2b+9 C.7a+7b D.5a+ 2b + 9

Answers

3a + 4 + b + 2a + 5 + b

5a + 2b  + 9

D.
D-- 3a+2a+b+b+4+5=5a+2a+9
Answer is D
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