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Alex Ar [27]
3 years ago
12

Find the exact solution of x.

Mathematics
2 answers:
Yuki888 [10]3 years ago
8 0

Answer:

x = +/- square root of 7

Step-by-step explanation:

3x^{2} +7=28\\3x^{2} =21\\x^{2} =7\\x=\sqrt{7} and x=-\sqrt{7}

MA_775_DIABLO [31]3 years ago
4 0

Answer:

the answer is a . hope this helps

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Howard draws two similar triangles.
Vlada [557]

Answer:

C. 8 centimeters

Step-by-step explanation:

The shortest side is half the length of the longest side.

(1/2)·(16 cm) = 8 cm

8 0
4 years ago
What is the height of an iscocles trapizoid, if the lengths of its bases are 5m and 11m and the length of a leg is 4m?
dsp73

Answer:

x=√5

Step-by-step explanation:

Use the pythagorean theorem

3 0
3 years ago
Find the value of x in the number (2x-15), (x-5), and 148 degrees
Mandarinka [93]

Answer:

Simplifying

2x + -15 + x + -5 = 148

Reorder the terms:

-15 + -5 + 2x + x = 148

Combine like terms: -15 + -5 = -20

-20 + 2x + x = 148

Combine like terms: 2x + x = 3x

-20 + 3x = 148

Solving

-20 + 3x = 148

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '20' to each side of the equation.

-20 + 20 + 3x = 148 + 20

Combine like terms: -20 + 20 = 0

0 + 3x = 148 + 20

3x = 148 + 20

Combine like terms: 148 + 20 = 168

3x = 168

Divide each side by '3'.

x = 56

Simplifying

x = 56

3 0
3 years ago
Please help this is paint BRAINLIEST AND HIGH POINTS for correct answer :(
nordsb [41]

Answer:

the last one trust me i am basically a calculator when it comes to math which is 2 1/3 more gallons

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Why are exponents used in mathematics? Please help!! 10 points!!
Oksi-84 [34.3K]
Hi There!
 
Exponents are used in math so its easier to multiply. For example if you have to do 8 * 8 * 8 * 8 * 8 * 8 * 8 * 8, then to make it easier to multiply you could change into the exponent form 8^{8}  that is what exponents are used for in math

Hope This Helps :)
4 0
4 years ago
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