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insens350 [35]
3 years ago
15

Find the value of the expression below when x =3/4 4x² + 8x - 5

Mathematics
1 answer:
kap26 [50]3 years ago
4 0

Answer:

4x² + 8x - 5

= 4(3/4)² + 8(3/4) - 5

= 4 × 9/16 + 24/4 - 5

= 36/16 + 24/4 - 5

= 9/4 + 6 - 5

= 9/4 +1

= <u>3</u><u>.</u><u>2</u><u>5</u>

Step-by-step explanation:

Hope it helps!!

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300 is 100% of what number?
laiz [17]
300/x=100/100
(300/x)*x=(100/100)*x       - we multiply both sides of the equation by x
300=1*x       - we divide both sides of the equation by (1) to get x
300/1=x 
300=x 
x=300

now we have: 
100% of 300=300

The answer is 300

8 0
3 years ago
Marta is solving the equation S = 2πrh + 2πr2 for h. Which should be the result?
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Answer:

Here the answer LOL

Step-by-step explanation:

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Cual expresion es equivalente a 5n+8 when n is equal 2
FromTheMoon [43]
If n is 2, you substitute 2 for n and multiply 5(2)+8= 10 +8 = 18
7 0
3 years ago
Find the area of quadrilateral ABCD
andreev551 [17]

Answer:

<em>A ≈ 28.5</em>

Step-by-step explanation:

a, b, c

P = a + b + c

Semiperimeter s = \frac{a+b+c}{2}

A = \sqrt{s(s-a)(s-b)(s-c)}

~~~~~~~~~~~~~~~

P_{ABC} = 4.3 + 2.89 + 6.81 = 14

s = 14 ÷ 2 = 7

A_{ABC} = \sqrt{7(7-4.3)(7-2.89)(7-6.81)} = √14.75901 ≈ 3.84

P_{BCD} = 8.59 + 7.58 + 6.81 = 22.98

s = 22.98 ÷ 2 = 11.49

A_{BCD} = \sqrt{11.49(11.49-8.59)(11.49-7.58)(11.49-6.81)} = √609.7343148 ≈ 24.6928

A_{ABCD} = 3.84 + 24.6928 ≈ <em>28.5</em>

3 0
3 years ago
Ents
valina [46]

Answer:

a) 1000 ftft

Step-by-step explanation:

sin 30 = 500/dist

dist = 500/sin 30 = 1000

3 0
3 years ago
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