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4 years ago

The temperature outside increases from 32 degrees to 56 degrees in one day. What is the percent of increase

Mathematics

1 answer:

Sholpan [36]4 years ago

4 0

Answer:

75%

Step-by-step explanation:

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The sum of four times a number and five times another number is -28. The sum of nine times the first number and two times the se

Rina8888 [55]

Answer:

Step-by-step explanation:

$x,\ y-the\ numbers\\\\\text{The sum of four times a number and five times another number is -28:}\\\\4x+5y=-28\\\\\text{The sum of nine times the first number and two times the second number is 11:}\\\\9x+2y=11\\\\\text{We have the system of equations:}\\\\\left\{\begin{array}{ccc}4x+5y=-28&\text{multiply both sides by2}\\9x+2y=11&\text{multiply both sides by (-5)}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}8x+10y=-56\\-45x-10y=-55\end{array}\right}\qquad\text{add both sides of the equation}$

$.\qquad-37x=-111\qquad\text{divide both sides by (-37)}\\.\qquad\qquad\boxed{x=3}\\\\\text{Put the value of x to the first equation:}\\\\4(3)+5y=-28\\12+5y=-28\qquad\text{subtrac 12 from both sides}\\5y=-40\qquad\text{divide both sides by 5}\\\boxed{y=-8}$

3 0

3 years ago

Place the following expressions in order from least to greatest based on the differences. = -6 = (-8) -1.9 = 4.3 2.5. - 8

aksik [14]

Answer:

yes

Step-by-step explanation:

reddit karma

7 0

3 years ago

HELP PLS<br><br> Graph: f(x) = 2(2)^x.

dexar [7]

Answer:

Some of the graph's coordinates are:

(-2, 1/2)

(-1, 1)

(0, 2)

(1, 4)

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

What is the domain of f?

lions [1.4K]

The answer for this question is C

4 0

3 years ago

Read 2 more answers

Given that the measure of ∠x is 120°, and the measure of ∠y is 60°, find the measure of ∠z.

Alexxx [7]

Answer:

60 degrees

Step-by-step explanation:

angle y is vertically opposite to angle a, (we can call it.)

angle x is supplementary to the other angle inside the triangle, which we can call angle b.

so, angle a is 60 degrees, as vertically opposite angles are equal

angle b is 60 degrees as supplementary angles = 180

based of the sum of angles in a triangle is 180 theorem;

60+60+unknown= 180

so unknown is 60 degrees

8 0

3 years ago