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jasenka [17]
3 years ago
13

Solve 7x+y=50 4x+y=23 simultaneously

Mathematics
2 answers:
Aloiza [94]3 years ago
6 0

<em>so</em><em> </em><em>the</em><em> </em><em>valu</em><em>e</em><em> </em><em>of</em><em> </em><em>x</em><em> </em><em>is</em><em> </em><em>9</em><em> </em><em>and</em><em> </em><em>y</em><em> </em><em>is</em><em> </em><em>-</em><em>1</em><em>3</em><em>.</em>

<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>

Cloud [144]3 years ago
4 0

Answer:

x = 9 and  y = -13

Step-by-step explanation:

7x + y =50.... eq 1

4x + y =23....eq 2

Subtract eq 2 from eq 1

7x + y = 50

-

4x + y = 23

This becomes;

7x - 4x + y - y= 50 -23

3x = 27

Divide both sides by the coefficient of x; 3

x = 9

Slot in the value of x in eq 1

7 (9) + y = 50

63 + y = 50

Subtract 63 from both sides

63 - 63 + y = 50 - 63

y = -13

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Factorise 5x^2-18x+16=0
Lunna [17]

Answer:

(5x-8)(x-2)

Step-by-step explanation:

or either use quadratic formula

5 0
2 years ago
please help me if you can if your going to say I'm cheating i don't care cause i know I'm not thanks!!​
Colt1911 [192]

Answer:

13.9 sorry if I'm wrong just trying to help.

Step-by-step explanation:

first plug in your numbers

a*2+ b*2= c*2

12*12= 144

7*7=49

144+49= 193

square root of 193: 13.89244399

rounded to nearest tenth is 13.9

6 0
3 years ago
Eva bought popcorn, candy and a drink at the movies. The popcorn was three times as expensive as the candy and the drink was twi
aliina [53]

The cost of popcorn, drinks, and candy is 5.25, 3.5, and 1.75.

Given,

Eva bought popcorn, candy, and a drink at the movies.

The popcorn was three times as expensive as the candy and the drink was twice as expensive as the candy.

Eva spent a total of 10.50

We need to find the cost of popcorn, candy, and drink.

We have,

Let the cost of the candy be C.

Now,

The popcorn was three times as expensive as the candy.

Cost of the Popcorn = 3C

The drink was twice as expensive as the candy.

Cost of the drink = 2C

Eva spent a total of 10.50

Cost of popcorn + cost of drink + cost of candy = 10.50

3C + 2C + C = 10.50

Adding

6C = 10.50

Dividing by 6 into both sides

C = 10.50/6

C = 1.75.

Now,

Cost of the Popcorn = 3C = 3 x 1.75 = 5.25

Cost of the drink = 2C = 2 x 1.75 = 3.5

Cost of the candy = C = 1.75

Thus the cost of popcorn, drinks, and candy is 5.25, 3.5, and 1.75.

Learn more about finding the cost of items with the given total cost here:

brainly.com/question/357628

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6 0
2 years ago
5. Simplify the expression by combining like terms. 16c+5e+10e+4
kherson [118]
Answer is d . 5+10 is 15 and everything else falls in line 16c+15e+4
8 0
3 years ago
Please explain step by step asap pleaseeee!! i need help on this!
marissa [1.9K]

Answer:

The answer is 3

Step-by-step explanation:

.000027/.000009 = 3

There's not much other steps you can add.

6 0
3 years ago
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