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2 years ago

Giving 40 points who help me

Mathematics

1 answer:

Elena L [17]2 years ago

7 0

Answer:

D is the answer. There are 5 boxes, that each has 3 filled in.

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A temperature of 1.64◦F corresponds to Answer in units of ◦C.

Liula [17]

Answer:

(1,64 °F − 32) × 5/9 = 73,333 °C

7 0

3 years ago

12 is what percentage of 80

PIT_PIT [208]

Answer: " 15 % " .

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→ " 12 is <u> 15% </u> of 80 " .

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Step-by-step explanation:

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12 = (n/100) * 80 ;

12 = (80n) /100 ; Solve for "n:

Note: 80/100 = (80/10) / (100/10) = (8/10) = 0.8 ;

12 = (0.8)n ;

↔ (0.8n) = 12

Multiply each side of the equation by "10" ; to get rid of the "decimal" ;

10 * (0.8n) = 10 * 12 ;

to get:

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8n = 120 ;

Divide each side of the equation by "8" ;

to isolate "n" on ONE SIDE of the equation; & to solve for "n" ;

8n/8 = 120/ 8 ;

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to get:

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n = 15 .

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Answer: " 15 % " .

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→ " 12 is <u> 15% </u> of 80 " .

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Hope this helps!

Best wishes!

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4 0

3 years ago

PLEASE HELP ME PICTURES INCLUDED

Nataliya [291]

Two equations given. We have to find the solution sets for the equations.

y = -x²-2x+8 and y = 2x +11

There are 3 steps given. As both equations are equal to y, so we can equate the x parts.

-x²-2x+8 = 2x+11

0 = x²+4x+3

0 = (x+1)(x+3)

Now we have to use zero product property to solve this. If multiplication of two terms equal to 0, we can set each of them equal to 0.

x+1 = 0 , x+3 = 0

When, x+1 =0, by moving 1 to the other side we will get x = -1.

When x+3 =0, by moving 3 to the other side we will get x =-3

Now for the two values of x, we have to find y .

When x = -1, by plugging in the value to the second equation we will get,

y = 2x+11 = 2×(-1)+11 = -2 +11 = 9

So for x =-1, y =9.

The solution set is (-1, 9)

Now when x = -3, by plugging in the value to the second equation we will get,

y = 2x+11 = 2×(-3) +11 = -6+11 = 5

So for x = -3, y = 5

The solution set is (-3,5)

Therefore, the solutions for the system of equations are (-3, 5) and (-1, 9)

So the third option is correct.

8 0

3 years ago

Which type of triangle is formed with the points A(1, 7), B(-2, 2), and C(4, 2) as its vertices?

Dafna1 [17]

We will have to use the distance formula in order to determine the lengths of each side of the triangle.

Distance formula: $\sqrt{(x_{2} - x_{1})^{2} + (y_{2} - y_{1})^{2} }$

Let's calculate AB first:
A (1, 7) and B (-2, 2)
A: x1 = 1 and y1 = 7
B: x2 = -2 and y2 = 2

so
$\sqrt{(-2 - 1)^{2} + (2 - 7)^{2} }$
$\sqrt{(-3)^{2} + (-5)^{2} }$
$\sqrt{9 + 25 }$
AB = $\sqrt{34}$ or (rounded to the nearest tenth) ≈ 5.8

Now let's do BC:
B: x1 = -2 and y1 = 2
C: x2 = 4 and y2 = 2

So
$\sqrt{(4 - -2)^{2} + (2 - 2)^{2} }$
$\sqrt{(6)^{2} + (0)^{2} }$
BC = $\sqrt{36 }$ or 6

Now let's do CA
C: x1 = 4 and y1 = 2
A: x2 = 1 and y2 = 7

So
$\sqrt{(1 - 4)^{2} + (7 - 2)^{2} }$
$\sqrt{(-3)^{2} + (5)^{2} }$
$\sqrt{9 + 25}$
CA = $\sqrt{34}$ or (rounded to the nearest tenth) ≈ 5.8

So let's recap:

AB ≈ 5.8
BC = 6
CA ≈ 5.8

So AB and AC are the same length while BC is .2 units longer which means this is an isosceles triangle.

4 0

3 years ago

My brain isn't working right now, please help.

Vinil7 [7]

Answer:

The author is trying to say that learning from before is not just learning acient times, but is also learning people of the past, how life was, and ways of living.

Step-by-step explanation:

8 0

3 years ago