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3 years ago

What is the inverse y=-4/5x + 11

Mathematics

1 answer:

kupik [55]3 years ago

3 0

Step-by-step explanation:

x = (-4/5)y + 11

(-4/5)y + 11 = x

y - 55/4 = ( -5/4)x

y = (-5/4)x + 55/4 is the inverse

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A 75 inch pipe is cut into two peices. One peice is two times the length of the other find the length of the shorter pipe

lesya692 [45]

I could be very wrong but I believe it’s 25

You can divide 75 by 3 and that will give you 25 and if the pieces were even they would be 37.5 but the shorter one is 2 times shorter

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3 years ago

im rlly confused (its yes and no answers)Decide if each pair of expressions is equivalent.6(-4t + 5) and -2(15 - 12t)1/5(20t - 1

kirill [66]

Given data:

The expression of the first option is,

$\begin{gathered} \text{6(-4t+5})and\text{-2(15}-12t) \\ =-6(5-4t) \end{gathered}$

Thus, the above expression are not equivalent.

The expression in the second option is,

$\begin{gathered} \frac{1}{5}(20t-15)\text{ and }4t-3 \\ 4t-3\text{ and 4t-3} \end{gathered}$

Thus, yes they are equivalent.

The expression in the third option is,

$\begin{gathered} 1.5\text{ }-2\text{t and 0}.25(8-6t) \\ 1.5\text{ }-2\text{t and 2-1.5t} \end{gathered}$

Thus, the above expression are not equivalent.

The expression in fourth option is,

$\begin{gathered} -3(t-7+5t+8)\text{ and }-18t-3 \\ -3(6t+1)\text{ and -18t-3} \\ -18t-3\text{ and -18t-3} \end{gathered}$

Thus, yes the above expression is equivalent.

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2 years ago

I need to know the answer to number 25 please thanks

yulyashka [42]

The single line marks indicate the two lines have the same length. Thus, the unknown length is 3 cm. 15 mm = 1.5 cm, 25 mm = 2.5 cm. The rest is trivial.

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3 years ago

The ratio of girls to boys in a particular classroom is 8: 7. How many boys are in the class if there are 45 students?

Dmitry [639]

9514 1404 393

Answer:

Step-by-step explanation:

Rearranging the given ratio, we can find the ratio of boys to the total.

boys : (boys +girls) = 7 : (7+8) = 7 : 15

Then the number of boys is ...

(7/15)(45) = 21

There are 21 boys in the classroom.

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3 years ago

How do I solve Cos-1(0.839) step by step?

Gelneren [198K]

Answer:

32.965°

Explanation:

To solve the expression we need to use the calculator, so:

$\text{cos}^{-1}(0.839)=32.965$

Therefore, the answer is 32.965°

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1 year ago