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Viefleur [7K]
3 years ago
15

Help me please i need this ASAP!!!!

Mathematics
1 answer:
Zigmanuir [339]3 years ago
6 0

Answer:

The chart shows a growth of 22-24 miles per gallon.

Step-by-step explanation:

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How many solutions does the following equation have? 5 x + 8 − 7 x = − 4 x + 1 5x+8−7x=−4x+15, x, plus, 8, minus, 7, x, equals,
UNO [17]

Answer: There is one valid solution to the equation 5x + 8 - 7x = -4x + 1, x = -3.5.

Step-by-step explanation:

8 0
2 years ago
How many times does the graph of 4x = 32 - x2 cross the x-axis?
garik1379 [7]

Answer:

The graph crosses the x-axis 2 times

The solutions are  x = -8  &  x = 4

Step-by-step explanation:

Qaudratics are in the form ax^2 + bx+ c

Where a, b, c are constants

Now, let's arrange this equation in this form:

4x=32-x^2\\x^2+4x-32=0

Where

a = 1

b = 4

c = -32

We need to know the discriminant to know nature of roots. The discriminant is:

D=b^2-4ac

If

  • D = 0 , we have 2 similar root and there is 2 solutions and that touches the x-axis
  • D > 0,  we have 2 distinct roots/solutions and both cut the x-axis
  • D < 0,  we have imaginary roots and it never cuts the x-axis

Let's find value of Discriminant:

D=b^2-4ac\\D=(4)^2 -4(1)(-32)\\D=144

Certainly D > 0, so there are 2 distinct roots and cuts the x-axis twice.

We get the roots/solutions by factoring:

x^2+4x-32=0\\(x+8)(x-4)=0\\x=4,-8

Thus,

The graph crosses the x-axis 2 times

The solutions are  x = -8  &  x = 4

6 0
3 years ago
Read 2 more answers
Probability of getting same number when rolling two dice
Soloha48 [4]
<span>6 of them are double 1,1 2,2 3,3 4,4 5,5 6,6
P(doubles)=6/36=1/6</span>
5 0
3 years ago
You and three friends go out to dinner. The cost of the dinner was $112.80. You leave an 18% tip. How much is your tip?
34kurt

Answer:

Bill

112.80

Tip %

15%

Number of people

4

Tip

per person

$4.23

Total

per person

$32.43

Step-by-step explanation:

4 0
2 years ago
Jerry is trying to earn two hundred nine dollars for some new video game. If he's charges forty-seven dollars to mow a lawn, how
Ghella [55]
47x > = 209....with x being number of lawns mowed
x > = 209 / 47
x > = 4.45....so he would have to mow at least 4.45 lawns.....but if u cant mow part of the lawn and u have to mow the entire lawn, the it would be at least 5 full lawns
5 0
3 years ago
Read 2 more answers
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