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GenaCL600 [577]
3 years ago
9

Find the missing angle in the triangle below

Mathematics
2 answers:
Makovka662 [10]3 years ago
8 0
The answer would be 58

180 - 65 - 57 = 58 which is the missing angle
jek_recluse [69]3 years ago
3 0

A triangle is equal to 180.

65+57=122

122+58=180

The answer is A.

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There are two values of a for which the equation 5x2+ax+7x+5=0 has only one solution for x. What is the sum of those values of a
JulsSmile [24]

Answer:

-14

Step-by-step explanation:

First of all, we know that 5x^2+ ax+7x +5=0 only has one root. That means that b^2 - 4ac=0, and we can use this to find the discriminant, ax + 7x.

Now, if we simplified 5x^2+ ax+7x +5=0, by dividing it all by 5, it would be x^2+(a+7)/5x + 1 = 0.

After, we can plug what we know into the formula, b^2 - 4ac=0. It would be:

(a+7)^2 / 25 - 4 = 0

(a+7)^2 / 25 = 4

(a+7)^2 = 100

Since this is a square root, a+7 can be both negative or positive.

a+7= 10, or a+7 = -10

a=3, or a=-17

The question asks for the sum of a, which is 3 + (-17) = -14

Therefore, the answer is -14.

:) have fun with your rsm problems, assuming you got this from the portal.

7 0
3 years ago
Simplify x^3/x? need help been stuck on this question forever
BlackZzzverrR [31]

x^3/x

= x^(3 - 1)

= x^2

Answer

x^2

8 0
3 years ago
Read 2 more answers
-2/5x - 1/2 + x = -40/11
IgorLugansk [536]

Answer: x = 6.56

Step-by-step explanation: -0.4x - 0.5 + x = 3.63

-0.4x^2 - 0.5 = 3.63

-0.4x^2 = 4.13

0.63x = 4.13

x = 6.56

7 0
2 years ago
Which is the same as moving the decimal point 3 places to the right in a decimal number
BlackZzzverrR [31]

Answer:

Moving the decimal 3 places to the right in a decimal number is the same as multiplying the number by 1000.

8 0
3 years ago
Please help! Show work!
Thepotemich [5.8K]

Answer:

the answer is im back and i dont know

Step-by-step explanation:

hi wanna talk i was rlly sick



4 0
3 years ago
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