All categories

3 years ago

Multiply (4n - 5)(2n + 5)

Mathematics

2 answers:

WINSTONCH [101]3 years ago

6 0

Answer:

-7n

Step-by-step explanation:

4-5= -1

2+5= 7

-1×7= -7

-7+n= -7n

likoan [24]3 years ago

4 0

Answer:

8n^2+10n-25

Step-by-step explanation:

it's probably wrong that's what I got tough xp

You might be interested in

The difference of two perfect cubes is 386. If the cube root of the smaller of the two numbers is 7, then the cube root of the l

choli [55]

Answer:

Step-by-step explanation:

Let the two perfect cubes be x and y where x > y.

According to the given conditions:

${x}^{3} - {y}^{3} = 386...(1) \\ y = 7...(2) \\ plug \: y = 7 \: in \: equation \: (1) \\ {x}^{3} - {7}^{3} = 386 \\ {x}^{3} - 343 = 386 \\ {x}^{3} = 343 + 386 \\ {x}^{3} = 343 + 386 \\ {x}^{3} = 729 \\ x = \sqrt[3]{729} \\ x = 9$

Thus the cube root of the larger number is 9.

8 0

3 years ago

5-x=3 work out the value of 3x squared

kati45 [8]

Answer:

z0mb13br41n5f1r3k1ng

Step-by-step explanation:

answer is 2

8 0

3 years ago

A 6 inch personal pizza has 640 calories, with 240 of those from fat. A 12 inch pizza is cutinto 8 slices. Estimate the number o

MissTica

Given:

Number calories in a 6-inch pizza = 640 calories

For the pizza of 6 inch

$A=\pi(3)^2=9\pi$

For the pizza of 12 inch

$A=\pi(6)^2=36\pi$

Number calories in a 6-inch pizza = 640 calories, therefore:

$\frac{A_{6\text{ inch}}}{A_{12\text{ inch}}}=\frac{640}{x}$

Substitute:

$\begin{gathered} \frac{9\pi}{36\pi}=\frac{640}{x} \\ Simplify \\ \frac{1}{4}=\frac{640}{x} \end{gathered}$

And solve for x:

$\begin{gathered} 1\cdot x=4\cdot640 \\ x=2560 \end{gathered}$

Now, Estimate the number of calories in one slice of a 12 inch pizza:

$\frac{2560}{8}=320$

Answer: 320 calories

4 0

1 year ago

What’s number 12 through 15 pls I need this ASAP

galben [10]

Answer:

12. 9

Step-by-step explanation:

12. Using Pythagoras theorem

let shortest distance be = x

8 square + 5 square = x square

64 + 25 = x square

89 = x square

Therefore x = square root of 89

Thus X = 9

8 0

3 years ago

When Sal rented a car for 3 days, he drove it a total of 90 miles and paid $193.35. When Ashley rented a car for 5 days and drov

lutik1710 [3]

Answer:

C. $59.95

Step-by-step explanation:

8 0

3 years ago