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3 years ago

Help!!! Please please I don’t know this at all

Mathematics

1 answer:

Lesechka [4]3 years ago

3 0

Answer:

X+y=180, Y=Z, X+Z=180

Step-by-step explanation:

Hope this helps, i remember doing this lesson.

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How do you solve this 3(2.6x-3=4(-7-2.8)

Maslowich

Answer:

$x=-3.87$

Step-by-step explanation:

We want to solve for $x$ in $3(2.6x-3)=4(-7-2.8)$

We expand to get: $7.8x-9=-28-11.2$

We group similar terms to get:

$7.8x=9-28-11.2$

This simplifies to $7.8x=-30.2$

Divide both sides by 7.8 to get

$x=\frac{-30.2}{7.8}= -3.8718$

4 0

4 years ago

What percent of 35 is 28

pantera1 [17]

35/100 = 28/x

35x = 28*100

35x = 2800

x = 80

6 0

3 years ago

Read 2 more answers

Maxim and Salma were asked to find an explicit formula for the sequence 54,63,72,81,... Maxim said the formula is f(n)=54+9n Sal

Sever21 [200]

ANSWER

The explicit rule is

$f(n) = 45+9n$

EXPLANATION

The given sequence is :

54,63,72,81,...

The first term of this sequence is

$a = 54$

The common difference is

$d =63 - 54 = 9$

The explicit rule is given by:

$f(n) = a + d(n - 1)$ $f(n) = 54+9(n -1 )$

We expand to get:

$f(n) = 54+9n -9$

$f(n) = 45+9n$

None of them is correct .

8 0

4 years ago

How to derive: f(w)=ln(cos(w-1))

postnew [5]

The word you're looking for is "differentiate", not "derive".

$\dfrac{\mathrm d}{\mathrm dw}\ln(\cos(w-1))=\dfrac{\frac{\mathrm d}{\mathrm dw}\cos(w-1)}{\cos(w-1)}=\dfrac{-\sin(w-1)\frac{\mathrm d}{\mathrm dw}(w-1)}{\cos(w-1)}=-\dfrac{\sin(w-1)}{\cos(w-1)}=-\tan(w-1)$

3 0

4 years ago

Which set of ordered pairs represents y as a function of x?

ikadub [295]

Answer:

{(1, 2), (2, -3), (3, 4), (4, -5)}

Explanation:

The domain, or x-value, isn't repeated, while it is in the other answer choices, making the others non-functions.

8 0

3 years ago