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3 years ago

What is the answer to this question please?

Mathematics

2 answers:

ddd [48]3 years ago

6 0

Answer:

53 + 1 = 54

give me brainllest if this is right okay?

dem82 [27]3 years ago

5 0

28 + 24 = 4 ( 7 + 6 )

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What are the domain and range of this function?<br><br> PLZ HELP ILL MARK AS BRAINLIEST!!!

Olenka [21]

Answer:

Domain {-5, -4, 1, 2, 4, 5}

Range {-4, -2, 1, 2, 4, 5}

Step-by-step explanation:

7 0

3 years ago

Assume that you heat your home with a heat pump whose heat exchanger is at Tc=2∘C, and which maintains the baseboard radiators a

elena-14-01-66 [18.8K]

Answer:

$187.61

Step-by-step explanation:

Data provided:

Temperature of the heat exchanger, Tc = 2° C = 273 + 2 = 275 K

Temperature of the base board radiators , Th=47° C = 273 + 47 = 320 K

Cost of heating the house = $1000

Coefficient of performance of the heat pump = 75% = 0.75

Now,

Actual performance = 75% of performance of heat pump

Actual performance = 0.75 × $\frac{\textup{Th}}{\textup{Th-Tc}}$

Actual performance = 0.75 × $\frac{320 K}{320-275}$

Actual performance = 0.75 × $\frac{320}{45}$

Actual performance = 5.33

Therefore, the cost = $\frac{\textup{1000}}{\textup{5.33}}$

cost = $187.61

5 0

4 years ago

9 ft19 ftPlease refer to the rounding rules in the instructions.Circumference of the base = 59.5feetArea of the base = 254.3squa

tiny-mole [99]

The volume of a right cone is one-third of the product of the area of the base B and the

$V=\frac{1}{3}Bh$

Since the area of the base and the height is already given, substitute the values in to the equation and then simplify.

$\begin{gathered} V=\frac{1}{3}(254.3)(16.7) \\ =\frac{1}{3}(4246.81) \\ \approx1415.603 \end{gathered}$

We may also find the exact value by substituting the given values into the equation below.

$V=\frac{\pi r^2h}{3}$

where V is the volume, r is the radius, and h is the height.

To obtain the exact value of the height, we use the Pythagorean theorem.

$\begin{gathered} a^2+b^2=c^2 \\ a^2=c^2-b^2 \\ a=\sqrt[]{c^2-b^2} \end{gathered}$

where a and b are the legs of the formed right triangle while c is its hypothenuse.

From the figure, the slant height is the hypothenuse while the radius, 9 ft, serve as one of the legs. Thus, the other leg, which is the height of the cone can be solved as follows.

$\begin{gathered} a=\sqrt[]{19^2-9^2} \\ =\sqrt[]{361-81} \\ =\sqrt[]{280} \end{gathered}$

Therefore, the height of the cone is as stated above.

Substitute the obtained height and the radius into the second formula that was stated.

$\begin{gathered} V=\frac{\pi r^2h}{3} \\ V=\frac{\pi(9^2)(\sqrt[]{280})}{3} \end{gathered}$

Simplify the right side of the equation. Evaluate the exponential expression.

$V=\frac{\pi(81)(\sqrt[]{280})}{3}$

Multiply the numerator and then divide it by 3.

$\begin{gathered} V=\frac{\pi(81)(\sqrt[]{280})}{3} \\ \approx\frac{(3.1416)(81)(16.7332)}{3} \\ \approx\frac{4258.0907}{3} \\ \approx1419.36 \end{gathered}$

Note that the value that we obtain at first, 1415,603, is slightly different from the one that we obtained, which is 1419.36, since there are values that we already rounded off before substituting the values in the equation.

Therefore, to be more exact, it is best to indicate that the volume of the given cone is approximately 1419.36 ft³.

7 0

2 years ago

Can someone solve this please?

Dominik [7]

2x = 8 - 5y
x = 8/2 - 5y/2
x = 4 - 2.5 y
or
x = 4 - 5/2 y

3 0

3 years ago

Quan uses 19 over 2 cups of flour recipe. after baking, one has 17 over 2 cups of flour left over. Find the number of cups of fl

zmey [24]

Answer: 8.5 cups of flour.

Step-by-step explanation: So he first has 19/2 cups of flour, 19/2 cups of flour is the recipe, which is 9.5 cups of flour. He finishes the recipe with 17/2 cups left, which is 8.5 cups of flour.

4 0

4 years ago