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elena-14-01-66 [18.8K]
3 years ago
7

Solve the system algebraically. check your work. 2x + 5y = 10 2x + 3y = 6

Mathematics
2 answers:
Afina-wow [57]3 years ago
7 0
2x + 5y = 10
2x + 3y = 6

You must remember:
Same sign = -
Different sign = +

2x + 5y - (2x + 3y) = 10-6
2x + 5y - 2x - 3y = 4
2x - 2x + 5y - 3y = 4
2y = 4
y = 4÷2
y = 2

2x + 5(2) = 10
2x = 10-10
2x = 0
x= 0÷2
x = 0
Alja [10]3 years ago
6 0
2x + 5y=10 .........equation 1
2x + 3y=6 .........equation 2

subtracting eq 2 from eq 1 we get
2y =4
y=2
putting y=2 in eq 1
we get
x=0
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Plz help me with this
jeyben [28]
10/15 =6/9

6*15=90
90/9=10, this is how I found 10,
also, is you simplify both, you get 2/3
7 0
3 years ago
Someone please please help me with this !
Elanso [62]

Answer:

551.8 feet

Step-by-step explanation:

We are given

Adjacent = 1300 feet

Opposite = x

Angle = 23°

We solve using the trigonometric function Tangent

tan θ = Opposite/Adjacent

tan 23 = x/1300 feet

Cross Multiply

x = tan 23 × 1300 feet

x = 551.81726107 feet

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The Length of the building = 551.8 feet

3 0
3 years ago
If m1 + m2 = 137°, what is m3?
Lemur [1.5K]

Answer:

m3=43°

Step-by-step explanation:

The total has to add up to 180° so 180-137 = 43°

7 0
3 years ago
Nine times a number is three thousand six hundred what is the number?
Inga [223]
The way this should be set up is: 

9a = 3600... 

So you must divide '9' on both sides, canceling out the '9', and making the 3600 to be '400'.. 

So the problem should look like: a = 400 <--- (Answer) 

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4 0
3 years ago
Read 2 more answers
A rectangular field has dimension of 91 feet by 60 and 1/3 feet what is the area of the field
Oliga [24]

Answer:

Area = 91*\frac{181}{3}=5490\frac{1}{3} square feet

Step-by-step explanation:

The area of a rectangle is given by the formula:

A = length * width

Where length is 91 feet and width is 60\frac{1}{3}  feet

Before we do the multiplication, we have to change the mixed number [width] into an improper fraction by using the rule shown below:

a\frac{b}{c}=\frac{(a*c)+b}{c}

Hence,

60\frac{1}{3}=\frac{181}{3}

So, the area is:

Area = 91*\frac{181}{3}=5490\frac{1}{3} square feet

8 0
3 years ago
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