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natita [175]
3 years ago
11

Help trying to help my daughter and I have no idea where to start

Mathematics
2 answers:
marysya [2.9K]3 years ago
6 0

Answer:

1/3

Step-by-step explanation:

5 * 3 =  15

SCORPION-xisa [38]3 years ago
6 0

Answer:

answer is scale of 1.25 == 5/4

Step-by-step explanation:

this is obtained by having the new side / the = old side, 15/12 =1.25, you can check it by doing 5*1.25 ==25/4 in decimal form.

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NEED HELP PLS FOR BOTH!!!
Kipish [7]
39/500 needs to be multiplied by 15, which results in 585/500. This is 1.17 as a decimal. 191/200 in diameter needs to be multiplied by 8, which equals 1528/200. This is 7.64 as a decimal.
4 0
3 years ago
Is the ans i got correct?<br>the total surface area is 33.8cm² <br>​
ElenaW [278]

Given:

A prism with height 5 cm and equilateral triangular base with side 2 cm.

To find:

The total surface area of the prism.

Solution:

Area of an equilateral triangle is:

A_1=\dfrac{\sqrt{3}}{4}a^2

Where, a is the side length.

Putting a=2, we get

A_1=\dfrac{\sqrt{3}}{4}(2)^2

A_1=\dfrac{\sqrt{3}}{4}(4)

A_1=\sqrt{3}

A_1\approx \sqrt{3}

The base and top of the prism are congruent so their area must be equal.

The lateral surface area of the prism is:

LA=Ph

Where, P is the perimeter of the base and h is the height of the prism.

The lateral surface area of the prism is:

A_2=(2+2+2)5

A_2=(6)5

A_2=30

Now, the total surface area is the sum of areas of bases and lateral surface area.

A=2A_1+A_2

A=2(1.73)+30

A=3.46+30

A=33.46

Therefore, the total surface area is 33.46 cm².

8 0
2 years ago
From the top of a vertical cliff 40 m high, the angle of depression of an object that is level with the base of the cliff is 34°
Rama09 [41]

Answer:

object is 59.30m away from the base of the cliff

Step-by-step explanation:

yessir

7 0
3 years ago
Solve for x. −23(3x−4)+3x=56
labwork [276]

Answer:

x = 6/11

Step-by-step explanation:

−23(3x−4)+3x=56

Distribute

-69x + 92 +3x = 56

Combine like terms

-66x+92 = 56

Subtract 92 from each side

-66x+92-92 = 56-92

-66x =-36

Divide each side by -66

-66x/-66 = -36/-66

x = 6/11

7 0
2 years ago
How to rationalize the denominator?​
VMariaS [17]

Step-by-step explanation:

So, in order to rationalize the denominator, we need to get rid of all radicals that are in the denominator.

Step 1: Multiply numerator and denominator by a radical that will get rid of the radical in the denominator. ...

Step 2: Make sure all radicals are simplified. ...

Step 3: Simplify the fraction if needed.

3 0
3 years ago
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