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tigry1 [53]
2 years ago
15

Help me with number 3 please

Mathematics
1 answer:
Harlamova29_29 [7]2 years ago
6 0
The answer would be 22%
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Solve for x<br> X^2+6x+9=20
Masja [62]

Answer:

x = 1.47  or x = -7.47

Step-by-step explanation:

x²+6x+9=20

This is a quadratic equation

x²+6x+9-20=0

x²+6x-11=0

Step 1 : Write the quadratic formula

x = <u>-b±√b²-4(a)(c)</u>

              2a

Step 2 : Substitute values in the formula

a = 1

b = 6

c = -11

x = <u>-6±√6²-4(1)(-11)</u>

              2(1)

x = <u>-6±√80</u>

          2

x = -3 + 2√5 or x = -3 - 2√5

x = 1.47         or x = -7.47

!!

4 0
2 years ago
Read 2 more answers
a bag contains 4 blue and 3 yellow marbles.The marbles are removed from the bag one at a time without replacement. what is the p
sertanlavr [38]
4/7 times 3/7 = the answer 12/49
7 0
2 years ago
A motorist traveled 250 miles on 11 gallons of gas. With the same vehicle, about how far could he go on 16 gallons of gas? A) 17
Andrei [34K]
ANSWER

363.6 \: miles
EXPLANATION

We were told that the motorist travelled 250 miles on 11 gallons of gas. This implies that,

250 \: miles \equiv11 \: gallons

Now we want to find how far he could go on 16 gallons.

x \: miles \equiv16 \: gallons


All other things being equal, the motorist should cover more than 250 miles with 16 gallons of gas.

Recall that: If more, less divides.

This implies that,

x =  \frac{250 \times 16}{11}




x =  \frac{4000}{11}   = 363.6 \: miles


Therefore the correct answer is C.

3 0
3 years ago
One week John earned three times as much as Alex earned mowing lawns. If they earned $48 altogether,how much did each one earn
Allisa [31]

Answer:Alex earned $12

              John earned $36

Step-by-step explanation:

j=3a

a+3a=48

4a=48

a=48/4

a=12

j=36

8 0
3 years ago
A.42.6 square units<br> B. 128 square units <br> C. 32 square units <br> D. 64 square units
kirill [66]

Answer:

Step-by-step explanation:

D. 64 square units

4 0
3 years ago
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