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3 years ago

6

Please help me with my Math quiz! It is about ratios.

2 answers:

Licemer1 [7]3 years ago

7 0

Answer:

6:2

12:4

Step-by-step explanation:

I’m not sure how to explain it but it just goes up by 2 and 1 cause that’s the amount that was given or smth

sesenic [268]3 years ago

6 0

Answer:

6:2 12:4

These three ratio's are equivalent because if you reduce them to simplest form the answer will be 3:1. You multiply each number in the ratio by how many batches you want so for instance 3×2=6 and 1×2=2 so this gives you your first ratio for the 2 batches and 3×4=12 and 1×4=4 this gives you the ration for 4 batches.

Hope it helps :)

Brainliest pls? Have a good day/night :)

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Bezzdna [24]

Answer:

$y=-\dfrac{9}{40}x^2+\dfrac{441}{40}\\ \\y=-\dfrac{9}{160}x^2+\dfrac{1,521}{160}$

Step-by-step explanation:

If a parabola has its vertex on the y-axis, then its equation is

$y=ax^2+b$

This parabola passes through the point R(3,9), then

$9=a\cdot 3^2+b\\ \\9=9a+b$

The area of the right triangle PQR is

$A_{PQR}=\dfrac{1}{2}\cdot PQ\cdot QR$

Find PQ and QR, if $P(x_1,0),\ Q(3,0),\ R(3,9):$

$PQ=\sqrt{(x_1-3)^2+(0-0)^2}=|x_1-3|\\\\QR=\sqrt{(3-3)^2+(0-9)^2}=9$

Now,

$40.5=\dfrac{1}{2}\cdot |x_1-3|\cdot 9\\ \\90=9|x_1-3|\\ \\|x_1-3|=10\\ \\x_1-3=10\ \text{or}\ x_1-3=-10\\ \\x_1=13\ \text{or }x_1=-7$

We get two possible points $P_1(-7,0)$ and $P_2(13,0).$

For point $P_1:\\$

$0=a\cdot (-7)^2+b\\ \\49a+b=0$

So,

$b=-49a\\ \\9=9a-49a\\ \\-40a=9\\ \\a=-\dfrac{9}{40}\\ \\b=\dfrac{441}{40}\\ \\y=-\dfrac{9}{40}x^2+\dfrac{441}{40}$

For point $P_2:\\$

$0=a\cdot (13)^2+b\\ \\169a+b=0$

So,

$b=-169a\\ \\9=9a-169a\\ \\-160a=9\\ \\a=-\dfrac{9}{160}\\ \\b=\dfrac{1,521}{160}\\ \\y=-\dfrac{9}{160}x^2+\dfrac{1,521}{160}$

5 0

3 years ago

If the translation is left 3 units and up 2 units, what is the rule used to describe the change?

serg [7]

(-3, 2) is the coordinate. I am not too sure what the rule is. It is possibly -3x+2.

3 0

3 years ago

Solve the equation 17=5k-3

Gre4nikov [31]

Answer:

k = 4

Step-by-step explanation:

17 = 5k - 3

+3. +3

20/5 = 5k/5

4 = k

k = 4

6 0

3 years ago

Read 2 more answers

Fifty two divided by 936

Alja [10]

Answer:

0.05 periodic.

Step-by-step explanation:

let's do 52/936.

3 0

2 years ago

Please guys helppp ;( F(x)=mx+ b, f(-2)=3 and f(4)=1 , what is the value of m and b

marshall27 [118]

Answer:

I think the answer is m= -1/3 b=7/3

Explanation:

so first, you need to make equations using the info that the question gave.

f(-2)= m(-2)+b f(4)= m(4)+b

= -2m+b =4m+b

f(-2)= 3 f(4)= 1

-2m+b= 3 4m+b=1 -(2)

b= 3+2m -(1)

substitute (1) into (2) : 4m+(3+2m)=1

4m+2m+3=1

6m=1-3

6m= -2

m= -2/6

m= -1/3

Substitute m= -1/3 into (2)

4(-1/3) + b=1

-4/3 +b =1

b= 1+ 4/3

b= 7/3

Therefore, m= -1/3 b=7/3

and that's how you do it

4 0

3 years ago