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Andrej [43]
2 years ago
9

I need help ! will mark brainliest!! :)

Mathematics
2 answers:
saveliy_v [14]2 years ago
8 0

Answer:

If you're rounding to the nearest 10th, the answer is 9.9.

Step-by-step explanation:

I solved it using the pythagoras theorem.

Where c = the square root of a^2 (a squared) plus b^2 (b squared).

(x = c in this case).

Since this is an isosceles triangle sides a and b both equal 7.

Hope this helped!

Marat540 [252]2 years ago
3 0

Answer:

Step-by-step explanation:

From the Pythagorean Theorem we know

h^2=a^2+b^2 (where h is the hypotenuse of a right triangle and a and b are its legs)

In this case the single tick marks on the legs indicate they are the same length then

h^2=a^2+b^2 becomes

h^2=2a^2, and a=7 so

h^2=2(7^2)

h=7(2^(1/2))

h=9.9

x=9.9 (to nearest tenth)

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If two sides of a triangle are 10 units and 13 units,a possible third side for the could be?
IrinaK [193]

Pythagorean theorem:

a^2+b^2=c^2

substitute:

10^2+13^2=c^2

simplify:

100+169=c^2

simplify:

269=c^2

take the square root:

c=16.4

The answer is 16.4

5 0
3 years ago
Reese is selling lemonade at the parade. He gets to keep 10% of the money he collects. A large lemonade is $7.00 and a small lem
jeka94

Answer:

We conclude that the simplified expression is:

0.10\left(7l\:+\:2s\right)=0.7l+0.2s

Step-by-step explanation:

Given the expression

0.10\left(7l\:+\:2s\right)

Apply the distributive law:   a(b+c) = ab+ac

a = 0.1, b = 7l, c = 2s

0.10\left(7l\:+\:2s\right)=0.1\cdot \:7l+0.1\cdot \:2s

                       =7\cdot \:0.1l+2\cdot \:0.1s

                        =0.7l+0.2s

Therefore, we conclude that the simplified expression is:

0.10\left(7l\:+\:2s\right)=0.7l+0.2s

4 0
3 years ago
The surface area of a cuboid is 102 cm2. If its length is 2 cm and its breadth is 3 cm, find its height.
Anna11 [10]

Answer:

Height h = 9 cm

Step-by-step explanation:

Given:

Surface area of cuboid = 102 cm²

Length l = 2 cm

Breadth b = 3 cm

Find:

Height h

Computation:

Surface area of cuboid = 2[lb + bh + hl]

102 = 2[(2)(3) + (3)(h) + (h)(2)]

51 = 6 + 3h + 2h

45 = 5h

Height h = 9 cm

3 0
2 years ago
Read 2 more answers
3. One weekend, 152 peopleattended an art exhibit. Thefollowing weekend, 298 peopleattended. To the nearest percent,what was the
castortr0y [4]

We can calculate the percent change dividing the change by the original amount of people attending the exhibit.

The increase is 298-152 = 146.

Then, we can calculate the percent change as:

\frac{298-152}{152}=\frac{146}{152}=0.9605=96\%

There was a 96% increase in the number of people attending the exhibit.

7 0
1 year ago
In an arithmetic sequence {an}, if a1 = 5 and d = 3, find a72. A) 216 B) 218 C) 221 D) 223
Phoenix [80]

The arithmetic sequence with the given condition is determined recursively by

\begin{cases}a_1=5\\a_n=a_{n-1}+3&\text{for }n>1\end{cases}

So we have

a_2=a_1+3

a_3=a_2+3=a_1+3(2)

a_4=a_3+3=a_1+3(3)

and so on with the general pattern

a_n=a_1+3(n-1)

This means the 72nd term in the sequence is

a_{72}=a_1+3(72-1)=5+3(71)=218

so the answer is B.

6 0
3 years ago
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