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Oksi-84 [34.3K]
3 years ago
9

What is the value of this expression when a = 7 and b=-4?

Mathematics
2 answers:
dexar [7]3 years ago
7 0

(2(7)) - ( \frac{ - 4}{ 3} ) \\ 14  + ( \frac{4}{3} ) \\  \frac{14}{1}  +  \frac{4}{3} \\  \frac{18}{3}  = 6 \\ d.6

s344n2d4d5 [400]3 years ago
4 0
<h2>VALUE OF |2a| - b/3</h2>

Answer:

The value of the expression |2a| - b/3 is \blue{15.\overline{3}} or \blue{15 \dfrac{1}{3}}.

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Use the quadratic formula to solve the equation​.<br><br> 4x^2−10x+5=0
finlep [7]

Quadratic formula:

x=\frac{-b±\sqrt{b^{2}-4ac } }{2a}

What do we have:

a=4

b=-10

c=5

Substitude:

x=\frac{10±\sqrt{b^{2}-4(4)(5)}}{2(a)}

Solve:

x=\frac{10±\sqrt{(-10)^{2}-4(4)(5)}}{2(4)}\\\\x=\frac{10±\sqrt{100-4(20)}}{8}\\\\x=\frac{10±\sqrt{100-4(20)}}{8}\\\\x=\frac{10±\sqrt{100-80}}{8}\\\\x=\frac{10±\sqrt{20}}{8}\\\\x=\frac{10±2\sqrt{5 }}{8}\\\\x=\frac{2(±5\sqrt{5) }}{2(4)}

Cancel the common terms:

x=\frac{5±\sqrt{5} }{4}

5 0
3 years ago
Point C is between points A and B on Find the missing length. AC = 12, AB = 34, CB = _____ a. 29 c. 28 b. 22 d. 32
JulsSmile [24]
Length of CB = Length of AB -AC
= 34 - 12 = 22
therefore the answer will be b.22
8 0
3 years ago
Pablo wants to get a grade of at least 95 in math this semesterSo far he has test scores of 89 98, 97 and 92. He will take his l
Alex Ar [27]

Answer:

the answer is 97 if you're rounding but 99 if you want exactly 95

Step-by-step explanation:

if you add all the previous grades up it'll add up to 376 and then when you add 97 and then divide it by 5 (the total amount of assignments) it'll add up to 94.6 which rounds up to a 95 unless you want it a 95 exactly which would probably be 99

3 0
3 years ago
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Grayson evaluated 4x2 + 2y for x = 3 and y = 2.
guajiro [1.7K]
Grayson did not simplify the question
5 0
3 years ago
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soldi70 [24.7K]

Answer:

The answer is 15

Step-by-step explanation:

area of triangle is half * base * height

So 1/2*5*6 is 15

6 0
3 years ago
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