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4 years ago

5x^2 - 9 - 7x^2 - x + 1

Mathematics

1 answer:

algol134 years ago

6 0

Answer:

−2x^2−x−8

Step-by-step explanation:

5x^2 - 9 - 7x^2 - x + 1 = −2x^2−x−8

5*x^2-9-7*x^2-x+1 = (-2*x^2)-x-8

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Does a triangle with side lengths 10, 49.5, and 50.5 form a right triangle ?

IRINA_888 [86]

Answer:

yes

Step-by-step explanation:

Use Pythagorean Theorem:

10² + 49.5² = 50.5² ??

100 + 2450.25 = 2550.25

2550.25 = 2500.25

8 0

3 years ago

Little help please? and thank you

Aneli [31]

Answer:

45.7

Step-by-step explanation:

Hello there!

We can calculate the missing angle using trigonometry

here are the trigonometric ratios

sin = opposite over hypotenuse

cos = adjacent over hypotenuse

tan = opposite over adjacent

We are given x's opposite side length (8) and x's adjacent side length (7.8)

we are given the information to use the trigonometric ratio tangent

so now we create an equation (remember tan - opposite over tangent)

$tan(x)=\frac{8}{7.8}$

now we solve for x

$\frac{8}{7} =1.025641026$

we're left with

$tan(x) =1.025641026$

finally we want to get rid of the tan

To do so we take the inverse of tan (arctan^-1) and apply it to each side

$arctan^-^1tan(x)=x\\arctan^-^1(1.025641026)=45.7252243$

so x = 45.7252243

finally we round to the nearest tenth and get that the answer is

45.7

4 0

3 years ago

Help with mathematics hw

Hunter-Best [27]

a. Let m = be the number of miles driven

Cost of NYC rentals: 525 + 0.21m

Cost of Metro Trucks: 585 + 0.13m

b. 525 + 0.21m = 850

0.21m = 325

M = 1,548 miles

c. Initial cost for NYC rentals = $525

Initial cost for Metro Trucks = $585

d. NYC rentals: 525 + 0.21 (500) = $630

Metro Trucks rentals: 585 + 0.13 (500) = $650

e. 525 + 0.21m = 585 + 0.13m

0.21m – 0.13m = 585 – 525

0.08m = 60

m = 750 miles

4 0

3 years ago

Tiana's Cafe offers two kinds of espresso: single-shot and double-shot. Yesterday afternoon, the cafe sold 50 espressos in all,

Step2247 [10]

Answer:

I am pretty sure its 43.48%

3 0

3 years ago

15. Which of the following numbers has the largest value? 9/2, 4 1/2, 4.505, 4.550

Dimas [21]

Answer:

4.550.

Step-by-step explanation:

Converting to decimal form:

9/2 = 4.5

4 1/2 = 4.5

4.505

4.550

The largest is 4.550.

5 0

2 years ago