All categories

2 years ago

This is a unit test right answers only pls

Mathematics

1 answer:

erma4kov [3.2K]2 years ago

7 0

Answer:

Step-by-step explanation:

took da test

You might be interested in

4) A rectangle as a length which is twice its width.

Yuki888 [10]

Answer:

Step-by-step explanation:

2 is it's length while in the perinthesis is x for its length plus the width which is doubled, explained by the x.

6 0

2 years ago

Solve by using the quadratic formula.<br> 3psquared+7p+2=0

Rainbow [258]

Answer:

$\large\boxed{x=-2\ or\ x=-\dfrac{1}{3}}$

Step-by-step explanation:

The quadratic formula of a quadratic equation

$ax^2+bx+c=0\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

We have the equation:

$3p^2+7p+2=0\to a=3,\ b=7,\ c=2$

Substitute:

$b^2-4ac=7^2-4(3)(2)=49-24=25\\\\\sqrt{b^2-4ac}=\sqrt{25}=5\\\\x_1=\dfrac{-7-5}{2(3)}=\dfrac{-12}{6}=-2\\\\x_2=\dfrac{-7+5}{2(3)}=\dfrac{-2}{6}=-\dfrac{1}{3}$

8 0

3 years ago

Read 2 more answers

Mikayla is building a pyramid of paper cups. The bottom row has 61 cups while the top row has only one cup. If there are 16 tota

worty [1.4K]

The number of cups will be equal to 496.

<h3>What is arithmatic progression?</h3>

The sequence in which every next number is the addition of the constant quantity in the series is termed as the arithmatic progression

Here we have the data:-

The bottom row has 61 cups

If there are 16 total rows

The number of the cups will be calculated as:-

$S_n=\dfrac{n(a_1+a_n)}{2}$

Here a1 is first term 1

an is last term 2

n is the total number of the rows

By putting the values in the question we will get:-

$S_n=\dfrac{16(1+61)}{2}=\dfrac{16\times 62}{2}=496\ cups$

Hence the number of cups will be equal to 496.

To know more about arithmetic progression follow

brainly.com/question/6561461

#SPJ1

3 0

2 years ago

YOU WILL HAVE BRAINLEST LITERALLY!

Korolek [52]

I’m thinking 120 because if they added ten to each that totals up to 20 and 140-20=120

8 0

3 years ago

(Poisson/Exponential) The number of automobiles that arrive at a certain intersection per minute has a Poisson distribution with

Usimov [2.4K]

Answer:

0.0110

Step-by-step explanation:

This is a Poisson distribution problem

Poisson distribution formula is given as

P(X = x) = (e^-λ)(λˣ)/x!

where λ = mean = 3 automobiles per minute

x = variable whose probability is required = more than 9 automobiles in a minute

P(X>9) = 1 - P(X ≤ 9)

P(X ≤ x) = Σ (e^-λ)(λˣ)/x! (Summation From 0 to x)

P(X < 9) = P(X=0) + P(X=1) + P(X=2) + P(X=3) + P(X=4) + P(X=5) + P(X=6) + P(X=7) + P(X=8) + P(X=9)

So, computing this one at a time, and summing it all up

P(X ≤ 9) = 0.99620

P(X>9) = 1 - P(X ≤ 9) = 1 - 0.99890 = 0.0110

6 0

3 years ago

Read 2 more answers