1 year ago

Let f(x) = cos(x). Use Addition or Subtraction Formulas to show the following.

Mathematics

1 answer:

uysha [10]1 year ago

7 0

Answer:

First blank is cos(h)cos(x)

Second blank is sin(x)

Step-by-step explanation:

Look up the identity and apply it here

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A newspaper and three hot chocolates cost $7. Two newspapers and two hot chocolates cost $6. How much does one hot chocolate cos

pochemuha

Answer:

the cost of one hot chocolate is $2.

Step-by-step explanation:

Let x be the hot chocolate cost and y be the newspaper cost.

Given:

A newspaper and three hot chocolates cost $7

So, the equation is

$3x+y=7$ --------(1)

Two newspapers and two hot chocolates cost $6

So, the second equation is.

$2x+2y=6$ ---------(2)

Find one hot chocolate cost?

Solve equation 1 for y.

$3x+y=7$

$y=7-3x$

Put y value in equation 2

$2x+2(7-3x)=6$

$2x+14-6x=6$

$14-4x=6$

$-4x=6-14$

$-4x=-8$

negative sign is cancelled both side.

$x=\frac{8}{4}$

$x=2$

Therefore, the cost of one hot chocolate is $2.

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2 years ago

Hannah does push-ups in sets of three she did 10 sets of push-ups today then her coach asked her to do 15 more push-ups how many

scoray [572]

Answer:

30+ 15 =45

Step-by-step explanation:

(3×10)+15 =45

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2 years ago

Can I simplest 48/30

brilliants [131]

Yes. it would be 1 and 18/30 or 1 9/15. it can also be 1 and 3/5 or 8/5

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2 years ago

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9) True or False: Great Britain officially recognized the Confederate States of America

SpyIntel [72]

It legally recognised the belligerent status of the Confederate States of America (CSA) but never recognised it as a nation and neither signed a treaty with it nor ever exchanged ambassadors.

And i could tell that its not math... :)

Its False

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3 years ago

In ΔEFG, e = 4.7 inches, f = 4.8 inches and g=3.6 inches. Find the measure of ∠E to the nearest 10th of a degree.

AleksAgata [21]

Answer:

66.3

Step-by-step explanation:

i just did it on deltamath

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