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docker41 [41]
3 years ago
7

How do you solve simultaneous equations

Mathematics
1 answer:
Sladkaya [172]3 years ago
7 0

Step 1: Multiply each equation by a suitable number so that the two equations have the same leading coefficient.

Step 2: Subtract the second equation from the first.

Step 3: Solve this new equation for y.

Step 4: Substitute y = 2 into either Equation 1 or Equation 2 above and solve for x.

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Is this true or false?
Degger [83]

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3 years ago
Which fraction expresses -30/54 in lowest terms?
Pavlova-9 [17]
-30/54 in simplest form:

First, we can start out by finding the greatest common factor (GCF) of the numerator (30) and the denominator (54). To do so, we will list the factors of each number, find the common ones and then the greatest.

Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
Factors of 54: 1, 2, 3, 6, 9, 18, 27, 54

Look through both sets of factors. Which are the common factors? 1, 2, 3, and 6 are the common factors of 30 and 54. Now, we have the find the greatest common factor. Basically, which number has greater value out of 1, 2, 3, and 6? The GCF is 6.

Second, our last step is to divide the numerator (30) and denominator (54) by our recently found GCF which was 6. This will create a new fraction which is in simplest form.

30 \div 6 = 5 \\ 54 \div 6 = 9

Let's collect our new numerator and denominator and rewrite our brand new fraction in its simplest form. 
-\frac{5}{9}

Answer in fraction form:\fbox {-5/9}
Answer in decimal form: \fbox {-0.5556}
7 0
4 years ago
The surface area of two hemispheres are in the ratio 64: 121. Find the ratio of<br> their radii
Blababa [14]

Answer:

5:7

Step-by-step explanation:

Let the radius of first hemisphere be 'r' units

Let the radius of second hemisphere be 'R' units

2 x \piπ x r^2 / 2 x \piπ x R^2 = 25 / 49

r^2 / R^2 = 25 / 49

r / R = 5 / 7

the ratio of radii is 5:7.

8 0
3 years ago
Read 2 more answers
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Step-by-step explanation: used Cymath calculator, i recommend it very helpful

6 0
3 years ago
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$13000 is compounded semiannually at a rate of 9% for 20 years
Dennis_Churaev [7]

Answer:

36400

Step-by-step explanation:


4 0
3 years ago
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