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3 years ago

Negative three times negative eleven

Mathematics

2 answers:

Papessa [141]3 years ago

8 0

Answer: 33

Step-by-step explanation:

lora16 [44]3 years ago

4 0

Answer:

positive 33

Step-by-step explanation:

a negative times a negative is a positive and 3 times 11 is 33

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claudia was cooking breakfast for her entire family. she made double the amount of chocolate chips pancakes as she did regular p

iren2701 [21]

Answer:

Step-by-step explanation:

where is the question?

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3 years ago

<img src="https://tex.z-dn.net/?f=%5Cfrac%7B%5Csec%5Cleft%28x%5Cright%29%7D%7B%5Ccos%5Cleft%28x%5Cright%29%7D-%5Cfrac%7B%5Csin%5

DanielleElmas [232]

Answer:

Step-by-step explanation:

First, convert all the secants and cosecants to cosine and sine, respectively. Recall that $csc(x)=1/sin(x)$ and $sec(x)=1/cos(x)$ .

Thus:

$\frac{sec(x)}{cos(x)} -\frac{sin(x)}{csc(x)cos^2(x)}$

$=\frac{\frac{1}{cos(x)} }{cos(x)} -\frac{sin(x)}{\frac{1}{sin(x)}cos^2(x) }$

Let's do the first part first: (Recall how to divide fractions)

$\frac{\frac{1}{cos(x)} }{cos(x)}=\frac{1}{cos(x)} \cdot \frac{1}{cos(x)}=\frac{1}{cos^2(x)}$

For the second term:

$\frac{sin(x)}{\frac{cos^2(x)}{sin(x)} } =\frac{sin(x)}{1} \cdot\frac{sin(x)}{cos^2(x)}=\frac{sin^2(x)}{cos^2(x)}$

So, all together: (same denominator; combine terms)

$\frac{1}{cos^2(x)}-\frac{sin^2(x)}{cos^2(x)}=\frac{1-sin^2(x)}{cos^2(x)}$

Note the numerator; it can be derived from the Pythagorean Identity:

$sin^2(x)+cos^2(x)=1; cos^2(x)=1-sin^2(x)$

Thus, we can substitute the numerator:

$\frac{1-sin^2(x)}{cos^2(x)}=\frac{cos^2(x)}{cos^2(x)}=1$

Everything simplifies to 1.

7 0

2 years ago

What is the solution of the system? Use substitution.<br><br> y = 6x + 2<br> 3y - 18x = 12

kicyunya [14]

3(6x+2)-18x=12 (y=6x+2, so you plug in 6x+2 into the y in 3y-18x=12)
18x+6-18x=12 (Then you distribute the 3 to the 6x and to the 2)
6=12 (Combine like terms 18x-18x)

There is no solution. Hope this helps and makes sense.

5 0

3 years ago

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Last week, it rained g inches. This week, the amount of rain decreased by 5%. Which expressions represent the amount of rain tha

soldi70 [24.7K]

Answer:

Step-by-step explanation:

5%×g= 5g/100

g-5g/100

4 0

3 years ago

Pls help it is too hard

ozzi

U have to substitute in the values of x to get the values of y

answers in order from left to right:
4.5, 4, 3.5, 3, 2.5, 2

ex of solving process:
x+2y=7
(-2)+2y=7
2y=9
y=4.5

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2 years ago

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