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2 years ago

PlEASE HELP URGENT!!!!!!!!!

Mathematics

2 answers:

ohaa [14]2 years ago

8 0

The answer is -3, i had a test with the same question

alukav5142 [94]2 years ago

7 0

Answer: i think 2 is right

Step-by-step explanation:

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30 pts please answer

ddd [48]

I think it's d but can't be sure

4 0

3 years ago

Read 2 more answers

a community theater sold a 400 full price tickets for adults and children that price was $8 per adult ticket and $5 per children

Vesnalui [34]

X + y = 400
8x + 5y = 2750

-5x - 5y = -2000
8x + 5y = 2750

3x = 750

250 adult tickets
150 children tickets

6 0

3 years ago

QRST is a square. PQ = 2√ RU = 4<br> What is the length of SU? Round to the nearest tenth.

777dan777 [17]

Answer:

$SU=3.5\ units$

Step-by-step explanation:

step 1

In the isosceles right triangle PQT

PQ=PT ----> because is an isosceles triangle

Applying the Pythagoras Theorem

we have

$PQ=PT =\sqrt{2}\ units$

$QT^{2}=PQ^{2} +PT^{2}$

substitute the values

$QT^{2}=\sqrt{2}^{2} +\sqrt{2}^{2}$

$QT^{2}=4$

$QT=2\ units$

step 2

In the square QRST

$RS=QT=2\ units$

step 3

In the right triangle RSU

Applying the Pythagoras Theorem

$RU^{2}=RS^{2} +SU^{2}$

we have

$RU=4\ units$

$RS=2\ units$

substitute the values and solve for SU

$4^{2}=2^{2} +SU^{2}$

$SU^{2}=4^{2}-2^{2}$

$SU^{2}=12$

$SU=2\sqrt{3}\ units$

$SU=3.5\ units$

8 0

3 years ago

Factor completely 3X^2 -25

Dominik [7]

In order to factor a polynomial, you have to find its roots

$x_1,\ x_2,\ldots,x_n$

So that you can factor it as

$p(x)=(x-x_1)(x-x_2)\cdots(x-x_n)$

So, in this case, we're looking for the solutions of

$3x^2-25=0 \iff 3x^2=25 \iff x^2 = \dfrac{25}{3} \iff x=\pm\sqrt{\dfrac{25}{3}}=\pm\dfrac{5}{\sqrt{3}}$

So, the polynomial can be written as

$3x^2-25 = \left(x-\dfrac{5}{\sqrt{3}}\right)\left(x+\dfrac{5}{\sqrt{3}}\right)$

5 0

3 years ago

HELP

Rus_ich [418]

Answer:

It's Cos again.

Thumbs-up

8 0

3 years ago