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4 years ago

Its only 13 14 15 and 16 thanks

Mathematics

1 answer:

PIT_PIT [208]4 years ago

5 0

I could only answer 14. and it is 138.3

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during 2002 the average person ate 220.8 pounds of meat how much meat does a family of 3 people eat in one year

7nadin3 [17]

You do 220.8 times 3. That's 662.4 pounds of meat in a year.

6 0

3 years ago

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Which equation can be used to solve for x in the triangle below?

Korolek [52]

Answer: its option 3 I just did the test right now

Step-by-step explanation:

7 0

3 years ago

3^2•3^n simplifies to 3^20 what is the value of the exponent n?

Lemur [1.5K]

Given that:
$3^2 \times 3^n = 3^20$
Solving for n.
Divide both sides by 3²
$\frac{3^2 \times 3^n}{3^2} = \frac{3^{20}}{3^2}$
Simplify
$3^n= 3^{20-2} \\
3^n=3^{18} \\$
$if \ a^{f(x)}=a^{g(x)} , \ then \ f(x)=g(x)$
So, n=18

Answer: n=18

5 0

3 years ago

This morning, some dragons, horses, and chickens were playing in my backyard. I counted 15 heads, 50 legs, and 4 wings. How many

klasskru [66]

We are given

number of heads =15

we know that

any healthy dragon has three heads

horse has 1 head

chicken has 1 head

Let's assume

number of dragons is x

number of horses is y

number of chickens is z

so, we will get

first equation:

$3x+y+z=15$

number of legs =50

any healthy dragon has four legs

chicken has 2 legs

horse has four legs

so, we can get second equation as

$4x+4y+2z=50$

we can simplify it

$2(2x+2y+z)=50$

$2x+2y+z=25$

now, we can find third equation

dragon has two wings

horse has no wings

chicken has two wings

so, we will get third equations as

$2x+0y+2z=4$

now, we can simplify it

$2x+2z=4$

$2(x+z)=4$

$x+z=2$

so, we will get system of equations as

$3x+y+z=15$

$2x+2y+z=25$

$x+z=2$

now, we can use substitution

We can find for z from third equation

$z=2-x$

we can plug this in first equation

$3x+y+2-x=15$

now, we can solve for y

$2x+y+2=15$

$y=13-2x$

now, we can plug this z and y into second equation

$2x+2(13-2x)+2-x=25$

now, we can solve for x

$x-4x+26=23$

$-3x=-3$

$x=1$

now, we can find y and z

$y=13-2x$

we can plug x=1

$y=13-2*1$

$y=11$

$z=2-x$

we can plug x=1

$z=2-1$

$z=1$

Hence ,

number of dragons is 1

number of horses is 11

number of chicken is 1............Answer

7 0

3 years ago

What is the vertex of the graph of f(x) = x2 + 10x - 9? A) (-5, -34) B) (-5, -9) C) (5, -9) D) (5, 66)

sukhopar [10]

Answer:

A) (-5, -34)

Step-by-step explanation:

f(x) = x^2 + 10x - 9

We complete the square to get the equation in vertex form

Take the coefficient of the x term and divide by 2 then square it. We add it and then subtract it not to change the value of the equation

f(x) = x^2 + 10x +(10/2)^2 - (10/2)^2 - 9

f(x) = x^2 +10x +25 -25 -9

f(x) = (x^2 +10x +25) -34

The term in parentheses simplified to (x+10/2) ^2

= (x+5)^2 -34

= (x - -5)^2 -34

This is in the form (x-h)^2 +k

The vertex is (h,k) h=-5 and k=-34

(-5,-34)

4 0

3 years ago

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