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ValentinkaMS [17]
3 years ago
6

Which ratio correctly compares 120 cm to 80 mm? A. 3 to 20 B. 3 to 2 C. 15 to 1 D. 150 to 1

Mathematics
1 answer:
AURORKA [14]3 years ago
8 0
120 ÷ 80 = 1.5 and 1.5 = 3/2
So A is correct

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What is the answer to this question? Please help and make it quick!
KonstantinChe [14]

Answer:

i believe it would be the las one im pretty sure but not 100% so hope it works and let me know if im right or not but again hope this helps

step-by-step explanation:

4 0
3 years ago
Write the equation of the line perpendicular to 2x+3y=9 that passes through (-2,5). Write your answer in slope-intercept form. S
Harman [31]
ANSWER

y =  \frac{3}{2} x + 8



EXPLANATION

The line given to us has equation,

2x + 3y = 9

We need to write this equation in the slope intercept form to obtain,


3y =  - 2x + 9



\Rightarrow \: y =  -  \frac{2}{3}x + 3


The slope of this line is

m_1 =  -  \frac{2}{3}
Let the slope of the perpendicular line be

m_2

Then
m_1 \times m_2 =  - 1


-  \frac{2}{3} m_2=  - 1

This implies that,

m_2 =  - 1 \times  -  \frac{3}{2}


m_2 =  \frac{3}{2}



Let the equation of the perpendicular line be,

y = mx + b

We substitute the slope to get,


y =  \frac{3}{2} x + b

Since this line passes through
(-2,5)
it must satisfy its equation.


This means that,

5=  \frac{3}{2} ( - 2)+ b


5 =  - 3 + b



5 + 3 = b


b = 8

Wherefore the slope-intercept form is

y =  \frac{3}{2} x + 8
6 0
4 years ago
Pls help for 27b!!!!!!!
rodikova [14]

Step-by-step explanation:

\beta

is a root of the quadratic

4 {x}^{2}  - 10x + 5

This quadratic isn't factorable so use the quadratic formula

- b +  -  \sqrt{ \frac{b {}^{2}  - 4ac }{2a} }

The plus and minus sign after b means we going to have two roots.

The roots are

\frac{5 +  \sqrt{5} }{4}

and

\frac{5 -  \sqrt{5} }{4}

We subsitue those values for Beta.

27a.

\frac{5}{2}

27b.

25

6 0
2 years ago
Which of the following expressions are equivalent to -5/-7×-11/-6 ​
USPshnik [31]

Answer:

B.

Step-by-step explanation:

-5/-7×-11/-6

= (-5 * -11)  / (-7*-6)

= 55 / 42.

A. =  - (6/-11) = 6/11

-5/7 * 6/11 =  -30/77.

B.   - (-11/7) = 11/7

5/6 * 11/7

= 55/42.

7 0
3 years ago
Which equations transform the parent secant graph to the parent cosecant graph?
jenyasd209 [6]

Answer:

B

Step-by-step explanation:

y=sec(x+pi/2)

Took the test on e2020

7 0
3 years ago
Read 2 more answers
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