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3 years ago

13

Tori spent 9 minutes on the phone while routing 3 phone calls. In all, how many phone calls does Tori have to route to spend a t

otal of 12 minutes on the phone? Solve using unit rates.

1 answer:

Vesna [10]3 years ago

8 0

9 minutes please please tell him that

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oksian1 [2.3K]

Given :-

a² - 2a - b² = 0
2b + 2ab = 0

To find :-

Value of a and b .

Solution :-

<u>Taking</u><u> </u><u>second</u><u> </u><u>equation</u><u>:</u><u>-</u>

2b + 2ab = 0
2b ( 1 + a ) = 0
2b = 0 or (1+a) = 0
b = 0 , a = -1

<u>Substitute</u><u> </u><u>in </u><u>first </u><u>equation</u><u> </u><u>:</u><u>-</u><u> </u>

a² - 2a - b² = 0

<u>When </u><u>b </u><u>=</u><u> </u><u>0</u><u> </u><u>,</u>

a² - 2a - 0² = 0
a² - a = 0
a( a -1) =0
a = 0 , 1

<u>When </u><u>a </u><u>=</u><u> </u><u>-</u><u>1</u><u> </u><u>,</u>

(-1)² - 2*(-1) - b² = 0
1 + 2 - b² = 0
b² = 3
b = ±√3

<u>Answer </u><u>:</u><u>-</u><u> </u>

a = 0,1 ; b = 0
a = -1 , b = ±√3

8 0

2 years ago

Question 10(Multiple Choice Worth 5 points)

MAVERICK [17]

So u have-27, positive 36

4 0

3 years ago

PLZ HURRY!!!!!!!!!!!!!<br> Simplify. <br> −4x^2(5x^4−3x^2+x−2)

Simora [160]

$\bold{Answer}$

$\boxed{\bold{-20x^6+12x^4-4x^3+8x^2}}$

$\bold{Explanation}$

$\bold{Simplify: \ -4x^2\left(5x^4-3x^2+x-2\right)}$

$\bold{------------------}$

$\bold{Distribute \ Parenthesis}$

$\bold{\left(-4x^2\right)\cdot \:5x^4+\left(-4x^2\right)\left(-3x^2\right)+\left(-4x^2\right)x+\left(-4x^2\right)\left(-2\right)}$

$\bold{Apply \ Addition \ / \ Subtraction \ Rules: \ +\left(-a\right)=-a,\:\:\left(-a\right)\left(-b\right)=ab}$

$\bold{-4\cdot \:5x^4x^2+4\cdot \:3x^2x^2-4x^2x+4\cdot \:2x^2}$

$\bold{Simplify \ -4\cdot \:5x^4x^2+4\cdot \:3x^2x^2-4x^2x+4\cdot \:2x^2: \ -20x^6+12x^4-4x^3+8x^2}$

$\bold{-20x^6+12x^4-4x^3+8x^2}$

$\boxed{\bold{Eclipsed}}$

5 0

3 years ago

F(x)=x^2-3x-2 is shifted 4 units right. The result is g(x). What is g(x)?

-BARSIC- [3]

Answer:

$\boxed{\mathrm{C.}\:\: g(x)=(x-4)^2-3(x-4)-2}$

Step-by-step explanation:

The function is shifted 4 units right.

The value of x in the function is subtracted from 4, because this is a horizontal translation.

$f(x)=x^2-3x-2$

$g(x)=(x-4)^2-3(x-4)-2$

8 0

3 years ago

Read 2 more answers

Find the measure of the missing angle using the triangle angle sum theorm

klasskru [66]

Answer:

31°

Step-by-step explanation:

The theorem states that all angle sums of any triangle add up to 180°.

128 + 21 = 149, and to find ?°, subtract 149 from 180 to get 31°.

8 0

3 years ago