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3 years ago

11

GUYS LOOK OVER HERE I DIDNT FINISH THE ANNA QUESTION!!!!!! Anna ate 2 doughnuts on mon, wed, and fri and ate 4 doughnuts in Thur

, and tue. She didn't eat any in sat and sun what is the average number of doughnuts that Anna each day of the week?

1 answer:

Lera25 [3.4K]3 years ago

8 0

2+4+2+4+2=16÷5=3.2 average

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5 + 4 – (10/2 – 8 × 3) × 4

olga2289 [7]

Answer:85

Step-by-step explanation:

Use PEMDAS (Parentheses Expinents Multiplication Divison Addition Subtraction) in that order to solve in the correct order

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3 years ago

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Use the quadratic formula to determine the solutions to the quadratic equation. Write your answers as decimals, and round to the

irina1246 [14]

Answer:

Either x≈ -1.12 or x ≈0.45

Step-by-step explanation:

Using the quadratic formula to solve this, we will follow the steps below;

First, write down the quadratic formula;

x = -b ±√b² - 4ac /2a

From the question, the equation given is: 6x²+4x−3=0

comparing the equation given withe standard equation ax² + bx + c=0

a= 6 b= 4 and c = -3

We can now proceed to insert the values into the formula;

x = -4 ±√4² - 4(6)(-3) /2(6)

x = -4 ±√16+72 /12

x = -4 ±√88 /12

Either x = -4+√88 /12

x ≈0.45

OR

x = -4 -√88 /12

x≈ -1.12

Either x≈ -1.12 or x ≈0.45

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3 years ago

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Kevin is making us a call model of the Statue of Liberty which is 306 feet tall if the model is 1/10 of the actual statue of Lib

anastassius [24]

Model of Statue of Liberty is 30.6 feet tall.

<u>Step-by-step explanation:</u>

Given the Statue of Liberty is 306 feet tall. If the model is 1/10 the actual size of the Statue of Liberty.

Actual size of the statue = 306

Model is $\frac{1}{10}$ of the actual size of the Statue of Liberty

Height of model = $\frac{1}{10}$ of the actual size

= $\frac{1}{10}$ * 306

= 30.6 feet

Model of Statue of Liberty is 30.6 feet tall.

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3 years ago

What is the result of subtracting in the second equation from the first? <br> -7x-y=0 <br> 7x+8y=-6

Vlad1618 [11]

Answer:

$-14x-9y=6$

Step-by-step explanation:

we have

$-7x-y=0$ ---> First equation

$7x+8y=-6$ --->Second equation

we know that

To subtract the 2nd equation from the first, negate all three of the second equation terms: -7x-8y=6

and then adds this result with the first equation

so

$-7x-y=0\\-7x-8y=6\\--------\\-14x-9y=6$

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3 years ago

A motorboat takes 3 hours to travel 108 kilometers going upstream. The return trip takes 2 hours going downstream. What is the r

Amanda [17]

Answer:

45; 9

Step-by-step explanation:

1) if the rate of the boat in still water is 'b' and the rate of the current is 'c', then it is possible to write the rate of the boat going upstream: b-c, downstream: b+c.

2) the basic formula is: D=r*t, where D - distance, r - rate/velocity, t - time;

3) according to the condition it takes 3 hours to travel 108 km upstream, it means according to the formula above 3(b-c)=108;

4) according to the condition it takes 2 hours to travel 108 km downstream, it means according to the formula above 2(b+c)=108;

5) if to make up the system of two equations, then:

$\left \{ {{3(b-c)=108} \atop {2(b+c)=108}} \right. \ => \ \left \{ {{b=45} \atop {c=9}} \right.$

6) rate of the boat in still water: 45 km/h;

rate of the current: 9 km/h.

3 0

3 years ago