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dimulka [17.4K]
3 years ago
15

X2 + 4x - 21 = 0 quadratic formula

Mathematics
1 answer:
Elena-2011 [213]3 years ago
6 0

Answer:

0

Step-by-step explanation:

x2 +4x-21=0. solve for x

x =  \frac{7}{2}

x = 3 \frac{1}{2}  \ x = 3.5

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PLEASE ANSWER ANY PROBLEM ASAP THANK YOU SO MUCH
Mashcka [7]

Answer:

1) No

2) Yes

3) angle UXS = 120 degrees

4) arc CB = 40 degrees

Step-by-step explanation:

If AB is tangent to the circle, then angle at A would be 90 degrees.

1)

Is 13^2 + 14.6^2 = 19.4^2?

169 + 213.16 = 376.36      No

2)

Is 8^2 + 6^2 = 10^2?

64 + 36 = 100      Yes

3)

arc WS = arc VU + arc TU = 113 degrees

arc ST = arc WV because their chords cross making a pair of vertical angles.

full circle = 360 degrees

360-113 - 113 = 134 degrees

134/2 = 67 degrees for arc ST

arc STU = 67 + 53 = 120 degrees

Angle UXS = 120 degrees

4) arc CB = arc FB =  40 degrees because their chords cross making a pair of vertical angles.

3 0
3 years ago
URGENT HELLLLPPP!!!!!!!!
MArishka [77]
Answers:
1. A.Complementary
2. C. Neither
3. B. Supplementary
4. Z= 128

Why?
The angles for #1 equal 90. For 2 it is not either option. 3 equals 180 and for 4 is 180-52 and you get 128
6 0
3 years ago
There are 9 snakes, 3 bats, 12 fish and 4 snails. What is the probability you choose a fish?
uysha [10]

Answer:

3/7

Step-by-step explanation:

add them all up 9+3+12+4=28

28 will be the bottom number of the fraction 12 wil be the top

12/28 then simplify by dividing by 2 6/14 then once more 3/7

6 0
3 years ago
4. Tyrell scored an 80% on his math test. If there were 40 questions, how many did he get correct?​
Neko [114]

Answer:

32 Questions

Step-by-step explanation:

If you do 80% times 40, it equals 32.

7 0
3 years ago
Read 2 more answers
A state university locks in costs for a student once a student starts attending the university. The total cost is $22,500. A stu
Alisiya [41]

Answer:B $630 Per Month So B

Step-by-step explanation: $22,500-$10,000=$12,500-$4,400=$8,100-$1,800=$6,300/10Months=$630

7 0
2 years ago
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