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3 years ago

Plz help me with these problems

Mathematics

2 answers:

Sophie [7]3 years ago

4 0

Answer:

The answer for 16 is A, the answer for 20 is D, and the answer for 25 is A

Step-by-step explanation:

For 16, the equation is 6a = 72. 6a is also equal to 6*a. To get a one side by itself, you have to divide both sides by 6.

For 20, it only makes sense for it to be a triangular prism because it has 2 triangles as the base and 3 faces

For 25, you can subtract what was the leftovers from the total number of pizzas. 8 - 1 3/4 - 5/6 is about 5.41, which is closer to 5 so the answer is 5.

elena-14-01-66 [18.8K]3 years ago

3 0

Answer: number 16 is d

number 20 is d

Step-by-step explanation:

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A function is _____ a relation. <br><br> A) always <br> B) sometimes <br> C) never

VikaD [51]

I believe that; A function is {A) sometimes} a relation.

4 0

3 years ago

2. Using Vièta's theorem, find the solutions to the equation. a) x^2 - 3x + 2 = 0 b) x^2 + 2x - 15 = 0.

olga_2 [115]

Given:

$\begin{gathered} x^2-3x+2=0 \\ x^2+2x-15=0 \end{gathered}$

Required:

We need to find the solution by Vièta's theorem.

Explanation:

Compare 1st equation with

$ax^2+bx+c=0$

we get

$\begin{gathered} a=1 \\ b=-3 \\ c=2 \end{gathered}$

Vièta's theorem is

$\begin{gathered} x_1+x_2=-\frac{b}{a} \\ x_1x_2=\frac{c}{a} \end{gathered}$

$\begin{gathered} x_1+x_2=3 \\ x_1x_2=2 \end{gathered}$

now solve this equation and we get

$\begin{gathered} x_1=1 \\ x_2=2 \end{gathered}$

because addition of 1 and 2 is 3 and multiplication is 2

Now for 2nd equation

$\begin{gathered} a=1 \\ b=2 \\ c=-15 \end{gathered}$

apply Vièta's theorem

$\begin{gathered} x_1+x_2=-2 \\ x_1x_2=-15 \end{gathered}$

by this

$\begin{gathered} x_1=3 \\ x_2=-5 \end{gathered}$

because addition of 3 and -5 is -2 and multiplication is -15

8 0

1 year ago

A large bag of marbles is 1/2 red,

cupoosta [38]

Answer:15%

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Find the value of each variable in the parallelogram. Please Help!!

Evgesh-ka [11]

Answer:

101

Step-by-step explanation:

7 0

3 years ago

Jason divides his first 1/2 mile of the trail into 3 sections. He puts a sign at the end of each section. If the signs are an eq

Blizzard [7]

Answer:

1/6 mile

Step-by-step explanation:

Distance divided = 1/2 miles

No of sections = 3

Each division must equal = 1/2/3

= 1/2*1/3 = 1/6 mile.

The distance between each of the signs i.e between the first and second , second and third is 1/6 of the mile.

This can be done in decimals as well

1/2 mile= 0.5 mile.

When we divide 0.5 mile by 3 we get 0.167 which is equal to 1/6 in fractions.

8 0

4 years ago