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3 years ago

Help me plz I only have 20 min!!

Mathematics

1 answer:

oksano4ka [1.4K]3 years ago

7 0

Answer: i think the equation would be 7n=8.61 and the cost would be 1.23

Step-by-step explanation:

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(2x - 1)(3x2 - 4x + 5) multiply the polynomial <br><br>

dmitriy555 [2]

Answer:

6x^3-11x^2+14x-5

Step-by-step explanation:

5 0

4 years ago

a runner is 7/8 mile from the finsh line. she can travel 3/8 mile per minute,how long will it take her to finsh the race

Simora [160]

I hope this helps you

if 3/8 miles per a hour

7/8 miles ? hour

?.3/8=7/8.1

?=7/3

?=2,3333... hour

4 0

4 years ago

Solve the equation and show all work. 4|x + 1/3| = 20 <br> i'm kind of stuck hhh

34kurt

Absolute value is a function that takes some number and outputs the size of that number, regardless of the sign. By definition, $|x|=x$ if $x\ge0$ , and $|x|=-x$ if $x$ .

For example,

|2| = 2 because the input 2 is positive, so the input is unchanged;
|-3| = -(-3) = 3 because the input -3 is negative, so the sign is switched.

What this means for this problem is that there are two cases to consider:

If $x+\frac13\ge0$ , then $\left|x+\frac13\right|=x+\frac13$ , so that

$4\left(x+\dfrac13\right)=20\implies x+\dfrac13=5\implies\boxed{x=\dfrac{14}3}$

On the other hand, if $x+\frac13$ , then $\left|x+\frac13\right|=-\left(x+\frac13\right)$ , so

$-4\left(x+\dfrac13\right)=20\implies x+\dfrac13=-5\implies\boxed{x=-\dfrac{16}3}$

6 0

4 years ago

7. Two classes have car washes to raise money for class trips. A portion of the

postnew [5]

Based on the information given, the percentage for the trip earnings rate for class A and B is 80% and 70% respectively.

<h3>How to calculate percentage.</h3>

From the information given, the trip earnings rate for A will be calculated thus:

= 16/20 × 100.

= 80%

The trip earnings rate for B will be calculated thus:

= 14/20 × 100

= 70%

Learn more about percentages on:

brainly.com/question/24304697

8 0

2 years ago

What is the graph of f(x)= -2x+2x-1

GuDViN [60]

It would be this. -2x and 2x cancel out, leaving you with fx=-1

7 0

3 years ago