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3 years ago

The answer and I don't get it

Mathematics

1 answer:

olga nikolaevna [1]3 years ago

5 0

The first question is cut off but the second isn't.
2. 700÷25=28, there are 28 students in Mr. blacks class

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5x-2y=-6 3x-4y = -26

snow_tiger [21]

For this case we must solve the following system of equations:

$5x-2y = -6\\3x-4y = -26$

We multiply the first equation by -2:

$-10x + 4y = 12$

We add the new equation with the second one:

$-10x + 3x + 4y-4y = 12-26$

We have different signs subtracted and the sign of the major is placed:

$-7x = -14\\x = \frac {-14} {- 7}\\x = 2$

Now we find the value of the variable "y":

$3x-4y = -26\\3 (2) -4y = -26\\6-4y = -26\\-4y = -26-6\\-4y = -32\\y = \frac {-32} {- 4}\\y = 8$

Thus, the solution of the system is given by:

$(x, y) :( 2,8)$

Answer:

$(x, y) :( 2,8)$

3 0

4 years ago

If the price showing on the pump is 3.799,what is the price per gallon to the nearest cent?

Lera25 [3.4K]

Answer:

3.80

Step-by-step explanation:

7 0

3 years ago

Simplified form of the expression (x^3+3x^2+6)-(9x^2-5x+7)

JulijaS [17]

$(x^3 + 3x^2 + 6) - (9x^2 - 5x + 7)\\\\x^3 + 3x^2 + 6 - 9x^2 + 5x - 7\\x^3 - 6x^2 + 5x -1$

8 0

4 years ago

A retailer purchased a camera for rs.1560 and sold it at 5% loss find the loss amount

zzz [600]

Answer:

Loss is Rs. 78

Step-by-step explanation:

Solution:

Given,

Cost Price (CP)= Rs.1560
Loss Percent (L%) = 5%

Here,

L%= L/CP ×100%

or,. 5 =L/1560×100

or,. 5×1560/100 =L

or,. L= Rs.78

Therefore, Loss is Rs.78

3 0

3 years ago

Which is the graph of the solution to the following compound inequality 7x + > 52 or 3 - x > 9

storchak [24]

Answer:

6x + 2; x = 2; 6(2) + 2 = 12 + 2 = 14

Step-by-step explanation:

6 0

3 years ago