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Luba_88 [7]
2 years ago
6

Pls help urgently extra points and mark brainlist

Mathematics
1 answer:
irina [24]2 years ago
7 0
Here’s the answer if you still need it -11/12 :)
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I need help doing this question
FromTheMoon [43]

Answer:

112°

Step-by-step explanation:

The sum of all of the angles needs to reach 360° to make a full circle.

59 + 108 + 81 = 248

360 - 248 = 112

6 0
3 years ago
The admission fee at a small fair is 1.50 for children and 4.00 for adults on a certain day 5,050 is collected if 1,000 adults a
blondinia [14]

1.50x + 4.00(1000) =5050 would be linear equation.

1.50x + 4000=5050

1.50x=1050

x=1050/1.50

x=700


7 0
2 years ago
9-(-0.87)-0.3 will someone please help me I can’t remember how todo this and my kid needs my help!
kenny6666 [7]

Answer: 9.57

Step-by-step explanation:

do 9 - -0.87 first.

that will give you 9.87

then you subtract 0.3

final answer: 9.57

7 0
1 year ago
Read 2 more answers
What is the total amount you would pay in a restaurant , if the bill was $70.00, and you first added 8.25% for the tax and then
faust18 [17]

Answer:

88.375

Step-by-step explanation:

70 x 0.0825

70 x 0.18

70 + ^

4 0
3 years ago
Read 2 more answers
Factor 4x^4+7x^2-2=0
natulia [17]

Answer:

(2x-1)(2x+1)(x^2+2) = 0

Step-by-step explanation:

Here's a trick:  Use a temporary substitution for x^2.  Let p = x^2.  Then 4x^4+7x^2-2=0 becomes 4p^2 + 7p - 2 = 0.  

Find p using the quadratic formula:  a = 4, b = 7 and c = -2.  Then the discriminant is b^2-4ac, or (7)^2-4(4)(-2), or 49+32, or 81.  

Then the roots are:

       -7 plus or minus √81

p=   --------------------------------

                        8

p = 2/8 = 1/4 and p = -16/8 = -2.

Recalling that p = x^2, we let p = x^2 = 1/4, finding that x = plus or minus 1/2.  We cannot do quite the same thing with the factor p= -2 because the roots would be complex.

If x = 1/2 is a root, then 2x - 1 is a factor.  If x = -1/2 is a root, then 2x+1 is a factor.  

Let's multiply these two factors, (2x-1) and (2x+1), together, obtaining 4x^2 - 1.  Let's divide this 4x^2 - 1 into 4x^4+7x^2-2=0.  We get x^2+2 as quotient.

Then, 4x^4+7x^2-2=0 in factored form, is (2x-1)(2x+1)(x^2+2) = 0.

6 0
3 years ago
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