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kupik [55]
3 years ago
15

Using the function f(x) = -3 x -5, calculate f(-7)

Mathematics
1 answer:
yan [13]3 years ago
7 0
Here you are , x= 16

Read the pic

Can you mark me BRAINLEST?

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3. Solve for x. Round to the nearest tenth.<br> 14<br> х<br> 49°
Elis [28]
So for this triangle you are going to use Cos, which is adjacent/hypotenuse.
In this case x is your hypotenuse.

So your equation is going to be Cos(49)= 14/x.
So in order to get x, you are going to have to multiply x by each side. So:

x • Cos(49)= 14/x • x.
Multiplying x and x is going to cancel each other out so your new equation is going to be:

xCos(49)=14.

Now we are going to divide each side by Cos(49). Dividing Cos(49) by itself, will cancel itself out, so then your new equation will be:

x = 14/Cos(49)

Now you are going to put that into your calculator and your answer will be

x = 9.18.

If i’m wrong please tell me and correct me.
Here is a photo of you don’t understand.

4 0
3 years ago
7 pens cost 84p, how much<br> would 11 pens cost?
Gelneren [198K]

Answer:

132p

Step-by-step explanation:

if 7 pens cost 84 total then you need to find the cost of each to know how much 11 pens would cost in total

84/7=12

now you know it's 12 each so just multiply 12 by 11 and you know how much for 11 total!

12*11=132p

3 0
1 year ago
Read 2 more answers
46 POINTS!!!!!!!!!!!!!<br><br> Simplify the expression 23r - 23r<br><br> please help me UwU
Lorico [155]

Answer:

1r-1r

Step-by-step explanation:

srry if its wrong i took that class a couple months ago

7 0
4 years ago
Find the measure of the indicated angle to the nearest degree.<br>A. 36<br>B. 30<br>C. 54<br>D. 60
STatiana [176]

Answer:

54 degrees

Step-by-step explanation:

This is trigonometry. So we are given the adjacent leg and hypotenuse. So we can use cosine(cah from soh cah toa)

We will have to use the inverse of the trig ratios.

Remember!

cos^-1 is not 1/cos(that is sec)

cos^-1(27/46)

acos(27/46)

54.0586701 and so on

Round to nearest degree 54

3 0
3 years ago
Carl has a rock collection. Of the rocks, 3/8 are quartz and 1/3 are granite. What fraction of Carl's rocks are quartz or granit
hoa [83]

Answer:

\frac{17}{24} <em>of Carl's rocks are quartz or granite</em>

Step-by-step explanation:

<u>Proportions and Fractions </u>

A proportion is expressed as a fraction a/b, where a and b are compared by division. If a=b, the proportion (or ratio) equals 1, if a<b, the ratio is less than 1, and if a>b, the ratio is greater than 1. The proportion of elements of a set to the total number of elements of the set is less than one, and the sum of all them equals 1.

We know 3/8 of Carl's rock collection are quartz and 1/3 are granite. If both subsets of rocks are mutually exclusive or disjoint (cannot happen simultaneously), then the proportion of both is the sum of the fractions.

\displaystyle \frac{3}{8}+\frac{1}{3}=\frac{9+8}{24}=\frac{17}{24}

4 0
3 years ago
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