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igor_vitrenko [27]
3 years ago
5

Help me with this!!!!!!

Mathematics
2 answers:
SVETLANKA909090 [29]3 years ago
5 0

Answer:

16.3

Step-by-step explanation:

You can use pynthagoras theorem.

And round it to nearest tenth...

hope i helped

Talja [164]3 years ago
5 0

Answer:

16.3 feet

Step-by-step explanation:

find the value of the missing side using the pythagorean theorem -

a^{2} + b^{2} = c^{2}  ->  3^{2} +a^{2} =7^{2}  ->  9 + a^{2} = 49  ->  a^{2} = 40  -> take the square root of both sides: \sqrt{a} = \sqrt{40}  ->  a = 6.3

then you add it with the other two sides to get the perimeter: 6.3 + 3 + 7 = 16.3

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Two triangles have bases with lengths 5in and 8in.
Elis [28]

Answer:

i. The ratio of the areas of the two triangles is 5:8.

ii. The area of the larger triangle is 24 in².

Step-by-step explanation:

Let the area of the smaller triangle be represented by A_{1}, and that of the larger triangle by A_{2}.

Area of a triangle = \frac{1}{2} x b x h

Where; b is its base and h the height.

Thus,

a. The ratio of the area of the two triangles is:

\frac{area of the smaller triangle}{area of the larger triangle}

Area of smaller triangle = \frac{1}{2} x b x h

                                       = \frac{1}{2} x 5 x h

                                       = \frac{5}{2}h

Area of the lager triangle = \frac{1}{2} x b x h

                                           = \frac{1}{2} x 8 x h

                                           = 4h

So that;

Ratio = \frac{\frac{5}{2}h }{4h}

         = \frac{5}{8}

The ratio of the areas of the two triangles is 5:8.

b. If the area of the smaller triangle is 15 in², then the area of the larger triangle can be determined as;

\frac{area of the smaller triangle}{area of the larger triangle} = \frac{5}{8}

\frac{15}{A_{2} } = \frac{5}{8}

5 A_{2} = 15 x 8

       = 120

A_{2} = \frac{120}{5}

    = 24

The area of the larger triangle is 24 in².

         

7 0
3 years ago
The length of overline CD is 12 units. C^ prime D^ prime is the image of overline CD under a dilation with a scale factor of n.
Rufina [12.5K]

Answer:

A, D , and E

Step-by-step explanation:

We have that:

\overline{CD} = 12 \: units

\overline{C'D'}

is the image of CD after a dilation of scale factor n.

We use the relation between the image length and object length:

\overline{C'D'} = n \times \overline{CD}

Option A

If n=3/2, then

\overline{C'D'}  =  \frac{3}{2}  \times 12 = 3 \times 6 = 18 \: units

This is true.

Option B

If n=4, then

\overline{C'D'} = 4 \times 12 = 36 \: units

This is false.

Option C

If n=8, then

\overline{C'D'} = 8 \times 12 = 96 \: units

This too is false.

Option D

If n=2, then

\overline{C'D'} = 2 \times 12 = 24 \: units

This is true

Option E

If n=3/4, then

\overline{C'D'} =  \frac{3}{4}  \times  12

\overline{C'D'} =  3 \times 3 = 9 \: units

This is also true.

4 0
3 years ago
Enter an equation in standard form for the line.<br> Slope is -5, and (-6, -10) is on the line.
fredd [130]
Y+10=-5(x+6)
Y +10= -5x-30
5x+y+40=0
3 0
3 years ago
Read 2 more answers
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ad-work [718]
The correct answer is B. -2/3 that is the slope
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3 years ago
6.<br> Find the measure of a.<br> 115°
Volgvan
Do you have a picture? i can help if you have one
4 0
3 years ago
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