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3 years ago

6. The temperature of an iron block decreases from 85°C to 25°C. If the mass for

Mathematics

1 answer:

Fittoniya [83]3 years ago

4 0

Answer:

8280 cal

Step-by-step explanation:

Q=mc(delta)T

Q=1200(0.115)(-60)

Q=8280 cal

I used 1200 g instead of 1.2 kg

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5 questions!!! 6 total but the last question will be separate will be giving 35 points to correct answer. Links will be ignored.

ki77a [65]

Answer:

Step-by-step explanation:

1)down 8 up 10

2)11.2

3)9+9+9+9+9=45

4)middle

5)77.0

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3 years ago

A kite is being flown at a 45 angle. The string of the kite is 120 feet long. How high is the kite above the point at which the

MrRissso [65]

Answer: The height of the kite above the point at which the string is held is $120\sqrt{2}$ feet.

Step-by-step explanation:

Given : A kite is being flown at $45^{\circ}$ . The string of the kite is 120 feet long.

Let AB denote the string of kite and AC be the height of the kite above the point at which the string is held.

Now, in right Δ ABC

$\sin45^{\circ}=\frac{AC}{AB}\\\Rightarrow\ \frac{1}{\sqrt{2}}=\frac{AC}{120}\\\Rightarrow\ AC=120\sqrt{2}$

hence, The height of the kite above the point at which the string is held is $120\sqrt{2}$ feet.

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3 years ago

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❗❗100POINTS❗❗+BRAINLIEST FOR CORRECT ANSWER<br>Show that 8x²-6x-275=0<br>thanks.

BaLLatris [955]

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

Here's the solution ~

Area of a Trapezoid is :

$\qquad \sf \dashrightarrow \: \dfrac{1}{2} \times (sum \: of \: parallel \: sides) \times height = 133 \: c {m}^{2}$

so ~

$\qquad \sf \dashrightarrow \: \dfrac{1}{2} \times ((x + 5) + (3x - 2)) \times (2x - 3) = 133 \:$

$\qquad \sf \dashrightarrow \: \dfrac{1}{2} \times (x + 5+ 3x - 2) \times (2x - 3) = 133 \:$

$\qquad \sf \dashrightarrow \: \dfrac{1}{2} \times (4x + 3) \times (2x - 3) = 133 \:$

$\qquad \sf \dashrightarrow \: \dfrac{1}{2} \times(8 {x}^{2} - 12x + 6x - 9) = 133 \:$

$\qquad \sf \dashrightarrow \: \dfrac{1}{2} \times(8 {x}^{2} - 6x - 9) = 133 \:$

$\qquad \sf \dashrightarrow \: (8 {x}^{2} - 6x - 9) =( 133 \times 2)\:$

$\qquad \sf \dashrightarrow \: 8 {x}^{2} - 6x - 9 =266\:$

$\qquad \sf \dashrightarrow \: 8 {x}^{2} - 6x - 9 - 266 = 0$

$\qquad \sf \dashrightarrow \: 8 {x}^{2} - 6x - 275 = 0$

hence, we got the required equation ~

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2 years ago

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What is the equation of the graph below?

kolezko [41]

Answer is D. No negative in front because the parabola opens upwards. x+3 moves it left 3. And - 1 moves it down one

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3 years ago

Alonso runs a company called Speedy House Painters. His workers can paint 3/4 of a house in one day. How many days would it take

marshall27 [118]

To find this answer, divide 6 by 3/4 or 0.75. From this you get 8. It would take 8 days to paint six houses.

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3 years ago

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