All categories

3 years ago

Multiply out and simplify: (x-8) (x-7)

Mathematics

2 answers:

MariettaO [177]3 years ago

7 0

<h2>Answer: x² - 15x + 56</h2>

<h3>Step-by-step explanation:</h3>

To expand the brackets, each term in the first bracket must be multiplied by each term in the second bracket and then simplified:

(x-8) (x-7) = (x × x) - (7 × x) - (8 × x) + (8×7)

= x² - 7x - 8x + 56

= x² - 15x + 56

Molodets [167]3 years ago

5 0

Answer: x^2-15x+56

Step-by-step explanation:

1-Distribute

x(x-7)-8(x-7)

2-Distribute

x^2-7x-8(x-7)

3-Distribute

x^2-7x-8x+56

4-Combine like terms

x^2-15x+56

You might be interested in

Drag each capacity to match it to an equivalent capacity.

weqwewe [10]

Answer:

2 cups ⇔ 16 fluid ounces
96 ounces ⇔ 6 pints
12 pints ⇔ 24 cups
4 quarts ⇔ 1 gallon

<em>Also see attached</em>

3 0

2 years ago

Read 2 more answers

A 28 ft ladder is leaned against the side of a building and its base is 5 ft away from the building. How far up the building wil

Sonja [21]

Answer:

27.55ft

Step-by-step explanation:

28²-5²=x

784-25=759

square root of 759=27.55

5 0

3 years ago

5x +20 and 9x. Solve for X

Dennis_Churaev [7]

If u were to add 5x+20=9x you’d get x=5

3 0

2 years ago

Find the derivative of f(x) = negative 9 divided by x at x = -4. (6 points) 4 divided by 9 16 divided by 9 9 divided by 16 9 div

Len [333]

Answer:

9/16

Step-by-step explanation:

$f(x)=-\frac{9}{x}$

$f(x)=-9x^{-1}$

Derivative rule:

$f(x)=x^{n} \\$

$\frac{df}{dx}=nx^{n-1}$

Here, n=-1, so

$\frac{df}{dx}=(-9)(-1)x^{-2} =\frac{9}{x^{2} }$

Evaluating this at x=-4 gives 9/16

5 0

3 years ago

Read 2 more answers

3y + 7 = x is this a direct proportion

Tju [1.3M]

Answer:

Step-by-step explanation:

if the ratio (yx) of two variables (x and y) is equal to a constant (k=yx) .in this case y is said to be directly proportional to x with proportionality constant k

3 0

3 years ago