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3 years ago

Help pls lol its timed

Mathematics

2 answers:

zaharov [31]3 years ago

6 0

The total area of the shape is 32

marusya05 [52]3 years ago

4 0

This is 32 sq units

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The number of students in a school was 860 last year. This year there are 790. What is the percentage decrease in the number of

Arada [10]

Percent decrease=decrease/original times 100

decreas=860-790=70
original=860

percent decrease=70/860 times 100
percent decrease=0.0813953 times 100
percent decrease=8.13953
about 8%

6 0

3 years ago

Read 2 more answers

Which of the following expressions is a factor of the polynomial x 2 +3/2x-1

Elodia [21]

Answer:

$\large \boxed{\sf \ \ \ (x+2)(x-\dfrac{1}{2}) \ \ \ }$

Step-by-step explanation:

Hello,

let's solve

$x^2+\dfrac{3}{2}x-1=0\\\\ 2x^2+3x-2=0 \ \text{multiply by 2}\\\\\\$

$\Delta=b^2-4ac=9+4*2*2=9+16=25$

There are two solutions

$x_1=\dfrac{-3-\sqrt{25}}{4}\\\\x_1=\dfrac{-3-5}{4}\\\\x_1=\dfrac{-8}{4}\\\\\boxed{x_1=-2}$

And

$x_2=\dfrac{-3+\sqrt{25}}{4}\\\\x_2=\dfrac{-3+5}{4}\\\\x_2=\dfrac{2}{4}\\\\\boxed{x_2=\dfrac{1}{2}}$

So we can write

$x^2+\dfrac{3}{2}x-1\\\\=(x-x_1)(x-x_2)\\\\=(x+2)(x-\dfrac{1}{2})$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

5 0

3 years ago

Jack is looking to buy a soda at the store. He notices that a 20oz bottle of soda costs $1.20 and a 12 oz can of soda costs $0.8

aleksley [76]

Unit price = price / quantity

1.20 / 20 = 0.06 per ounce

0.85 / 12 = 0.071 per ounce

The better deal is the 20 oz for $1.20

5 0

3 years ago

PLEASE HELP ME EVERYONE HAS GOTTEN THIS WRONG ITS GONNA SUBMIT IN 15 MIN PLS HELP THANK YOU

Tju [1.3M]

Answer:

x = 8.66

Step-by-step explanation:

Apply pythagorean theorem to find the value of x.

Thus:

x² = 14² - 11²

x² = 75

x = √75

x = 8.66025404

x = 8.66 (nearest hundredth)

8 0

3 years ago

The orbital period, P, of a planet and the planet’s distance from the sun, a, in astronomical units is related by the formula P=

Elodia [21]

Answer: 9.54731702 astronomical units

Step-by-step explanation:

Given: The orbital period, P, of a planet and the planet’s distance from the sun, a, in astronomical units is related by the formula $P=a^{\frac{3}{2}$ .

Saturn’s orbital period P = 29.5 years

Substitute this value in the equation above, we get

$29.5=a^{\frac{3}{2}}\\\Rightarrow(29.5)^{\frac{2}{3}}=a\\\Rightarrow\ a=9.54731702\text{ astronomical units}$

Hence, its distance from the sun = 9.54731702 astronomical units.

3 0

3 years ago

Read 2 more answers