1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
LUCKY_DIMON [66]
3 years ago
12

Solve the system using elimination. 5x + 8y = –29 7x – 2y = –67

Mathematics
1 answer:
Snowcat [4.5K]3 years ago
8 0
7x-2y+-67
<span>multiply both sides of the bottom by 4 and add </span><span>                                           5x+8y=-29 </span>
<span> 28x-8y=268</span>
 
  33x=-297
<span>   x=-9 </span>


<span>5(-9) +8y= -29 </span>
<span>-45 +8y =-29 </span>
<span>8y= 16 </span>
y=2
You might be interested in
HELP NOW!!!! thx :DDDD
Natali5045456 [20]

Answer:

the second one

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Which of the following is not equal to sin⁡(-230°)?
xenn [34]

From trigonometry we know that:

if sin(\theta)=sin(\alpha)

then, \theta=n\pi+(-1)^n\alpha (where n is an integer)

This can be rewritten in degrees as:

\theta=n(180^{\circ})+(-1)^n\alpha.............(Equation 1)

Now, in our case, \alpha=-230^{\circ}

Therefore, (Equation 1) can be written as:

\theta=n(180^{\circ})+(-1)^n(-230^{\circ})..........(Equation 2)

Now, to find the correct options all that we have to do is replace n by relevant integers and find the values of \theta that match.

For n=2, (Equation 2) gives us: \theta=2\times 180^{\circ}+(-1)^2(-230^{\circ})=360^{\circ}-230^{\circ}=130^{\circ}.

Thus, sin(230^{\circ})=sin(130^{\circ})

Now, we know that: -sin(-50^{\circ})=sin(50^{\circ})

Let n=-1, then:

\theta=(-1)\times 180^{\circ}+(-1)^{-1}(-230^{\circ})=-180^{\circ}+230^{\circ}=50^{\circ}

Thus, sin(-230^{\circ})=-sin(-50^{\circ})

Likewise, sin(-230^{\circ})=sin(50^{\circ})

Only the last option sin(-50^{\circ}) will never match sin(-230^{\circ}) because no integral value of n will ever give \theta=-50^{\circ}

Thus the last option is the correct option.

3 0
3 years ago
Read 2 more answers
Help with the problem in picture ​
Flauer [41]

Answer:

The slope of a line is a measure of its steepness. Mathematically, slope is calculated as "rise over run" (change in y divided by change in x).

Step-by-step explanation:

7 0
2 years ago
The bees buzzed by the beatiuful blue bag, what is this?
11111nata11111 [884]
Alliteration

how I remember is that the 2 L’s are together in the word, and the same letter is repeated in the sentence.
if that makes sense,

hope i’m not too late!!
8 0
3 years ago
Read 2 more answers
URGENT
Alexeev081 [22]
Ts temperature as a function of time is given by T(t)=a(1-e^kt)+b
the values of a and b area = 50 Fb = 350 F
this is very evident to equation the b is the initial temperatre of the oven which is 350 F
and also a is the initial temperature of the potato because it is the term multiplied by the exponent term which will indicate the temperature increasse of the potato
7 0
3 years ago
Other questions:
  • Chantal is building a fence around her swimming pool. The pool is 25 ft long and12 ft wide, and she wants a 6-ft wide rectangula
    12·1 answer
  • Jonathan has been on a diet since January 2013. So far, he has been losing weight at a steady rate. Based on monthly weigh-ins,
    5·1 answer
  • Question 44 Unsaved
    7·2 answers
  • Marcie wants to enclose her yard with a fence. Her yard is in the shape of a rectangle attached to a triangle. The formula for t
    6·1 answer
  • Help PLZ will get points + brainliest
    7·2 answers
  • 3? Choose the THREE correct answers.
    10·1 answer
  • 1. Many Alpine ski centers base their calculations of revenues and profits on the belief that the average skier ski’s four times
    13·1 answer
  • What are the missing operations?
    8·1 answer
  • You are considering adding a new food product to your store for resale. You are certain that, in a month, the minimum demand for
    7·1 answer
  • HELP ASP SHOW UR WORK WILL GET BRAINILEST AND 10 points
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!