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Vera_Pavlovna [14]
2 years ago
12

Solve each equation by factoring. 5a^2-2a-47=0

Mathematics
1 answer:
sergey [27]2 years ago
4 0

Answer:

a = -2.872 and 3.272

Step-by-step explanation:

Given the equation 5a^2-2a-47=0

Using the general formula;

a = 2±√2²-4(5)(-47)/2(5)

a = 2±√4+940/10

a = 2±√944/10

a =  2±30.72/10

a = 2-30.72/10 and 2+30.72/10

a = -28.72/10 and 32.72/10

a = -2.872 and 3.272

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What value of B will make the product equal of 17 in the following expression: 17xb/7
Katyanochek1 [597]

The value B is 7. If we apply B=7 the answer is 17 for the expression 17×\frac{b}{7}

Step-by-step explanation:

            The given expression is 17×\frac{b}{7}  

Step:1

            Form an equation from given data,

            17×\frac{b}{7}= 17..............................(1)

                                                         (∵ product equal to 17)

Step:2

            Check for alternatives by apply the value of B in eqn (1)

            Assume be value of B for check the equation

            B=1

            Equation becomes,

            17×\frac{1}{7} = 2.4286 ≠ 17

            Take, B=2,

            17×\frac{2}{7} = 4.8571 ≠ 17

            Take, B=3,

            17×\frac{3}{7} = 7.2857 ≠ 17

similarly,

            B=7,

            17×\frac{7}{7} = 17                       (∵ The product equals to 17)

Result:

         So, the answer for B is 7.

7 0
3 years ago
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How do you solve an equation when yhe variable is being divided by a whole number
valentinak56 [21]
For example, if x/2=7, x would be equal to 7x2=14, bringing the whole number the variable is divided by to the other side of the equation.
4 0
2 years ago
Find the value of X in each of the given triangles.​
ki77a [65]

<DSR + <SRD + <RDS = 180° (Angle sum property)

2x + x +3x = 180°

6x = 180°

x = 180°/6

x = 30°

So, <SRD = x = 30°

<RDS = 3x = 3(30°) =90°

<DSR = 2x = 2(30°) = 60°

Hope it helps !

✌️

Jai hind !

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3 years ago
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The 7th grade class is putting on a
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1495-400=1095
1095=15x
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4 0
2 years ago
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I need to find the angle sum
balandron [24]

Answer:

x = 76°

z = 14°

y = 42°

Step-by-step explanation:

48 + 2x = 180° because these three makes a straight line

2x = 180 - 48

2x = 132

x = 76°

x + z = 90° because these two angles are complementary angles since we know the value of x

76 + z = 90°

z = 90 - 76

z = 14°

48° + y = 90° because these two angles are complementary angles

y = 90 - 48

y = 42°

8 0
2 years ago
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