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Lera25 [3.4K]
3 years ago
7

I need help with these questions ‍♂️ please ?

Mathematics
1 answer:
Debora [2.8K]3 years ago
6 0

cba

Step-by-step explanation:

first first one to see second one is b last one is a

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Maria wants to solve the following system using the elimination method: 4x+9y=59 and x+y=17What number should the equation x+y=1
11111nata11111 [884]
\left\{\begin{array}{ccc}4x+9y=59\\x+y=17&|multiply\ both\ sides\ by\ (-9)\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}4x+9y=59\\-9x-9y=-153\end{array}\right}\\.\ \ \ -5x=-94
3 0
4 years ago
Point R is on line segment QS. Given RS= 5 and QS<br> 5 and QS = 16, determine the length<br> QR.
amid [387]

The value of QR is 11

<h3>How to determine the length of QR?</h3>

The given parameters are:

RS = 5

QS = 16

Because R is on QS, then we have:

QS = QR + RS

This gives

16 = 5 + QR

Evaluate

QR = 11

Hence, the value of QR is 11


Read more about lengths at:

brainly.com/question/17297081

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8 0
2 years ago
What is the greatest number of right angles that a triangle can contain?
babunello [35]

Answer:B. 1

Step-by-step explanation:

If it has more than 1 it won’t be a triangle anymore.

6 0
4 years ago
Read 2 more answers
Simplify - tanx-(sec^2 / tanx)
Mashcka [7]

Answer:

-cot(x)

Step-by-step explanation:

tanx-(sec^2x  / tanx)

Lets get a common denominator of tan

tan x * tan x/ tan  -sec ^2 x/ tan x

tan ^2 x - sec ^2 x

---------------------------

tan x

We know than sec^2 - tan^2 =1  (trig identity)  so factor out -1

-1(-tan ^2 x + sec ^2 x)

---------------------------

tan x

-1(1)

---------------------------

tan x

-1

----------

tan (x)

We know  1/ tan x = cot (x)

- cot(x)

7 0
3 years ago
Emily measured the height of a dresser as 4.27 feet, but the actual height was 4 feet. What is the percentage of error in Emily’
Assoli18 [71]
We need to find the percentage of the extra feet that she measured, so first we have to find out how much that is. We can do this by simply subtracting:

4.27 - 4 = 0.27

Now we can set up a proportion to find the percentage.

\frac{0.27}{4}  \frac{x}{100}

Solve for x

0.27 x 100 = 27
27/4 = 6.75

The answer is 6.75% :)

Hopefully this helps! If you have any more questions or don't understand, feel free to DM me, and I'll get back to you ASAP! :)
6 0
3 years ago
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