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andreev551 [17]

4 years ago

15

Jenny drove 1,255 miles last week. She drove 187 miles on Monday. On Tuesday, she drove 53 more miles than on Monday, on Wednesd

ay she dove 26 more miles than on Tuesday. How many more miles did Jenny drove on Monday and tuesday together than on Wednesday and Thursday together?

1 answer:

geniusboy [140]4 years ago

4 0

The answer should be 401

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What are the approximate solutions of 2x2 + 9x = 8 to the nearest hundredth?

bagirrra123 [75]

$2x^{2}$ + 9x = 8 Subtract 8 from both sides
<span> $2x^{2}$ + 9x -8 = 0 Plug these into the Quadratic Formula
</span>
a = 2 , b = 9 , c = -8

x = $\frac-{b (+ or -) \sqrt{ b^{2} - 4ac} }{2a}$ Plug in the values
x = $\frac{-9 (+ or -) \sqrt{ 9^{2}-4(2)(-8) } }{2(2)}$ Multiply 2 and 2
x = $\frac{-9 (+ or -) \sqrt{ 9^{2}-4(2)(-8) } }{4}$ Multiply -4 and 2
x = $\frac{-9 (+ or -) \sqrt{ 9^{2}-8(-8) } }{4}$ Multiply -8 and -8
x = $\frac{-9 (+ or -) \sqrt{ 9^{2}+64} }{4}$ Square 9
x = $\frac{-9 (+ or -) \sqrt{81 + 64} }{4}$ Add 81 and 64
x = $\frac{-9 (+ or -) \sqrt{145} }{4}$ Take apart the (+ or -)
x = $\frac{-9 + \sqrt{145} }{4}$ and $\frac{-9 - \sqrt{145} }{4}$ Find the square root of 145
<span>x </span>≈<span> $\frac{-9 +12.0415945788}{4}$ or $\frac{-9 -12.0415945788 }{4}$ Add -9 and the decimal , Subtract -9 and the decimal
</span>x ≈ $\frac{3.0415945788}{4}$ or $\frac{-21.0415945788}{4}$ Divide both fractions
x ≈ 0.7603986447 or -5.2603986447 Round to the nearest hundredth (_._x)
x ≈ 0.76 or -5.26

5 0

3 years ago

Click here What is the average rate of change for this exponential function for the interval from x=2 to x = 4? 15 10 -5 5 10 O

Triss [41]

Answer:

c. 6

Step-by-step explanation:

Given

See attachment for graph

Required

Average rate of change

This is calculated as:

$Rate = \frac{f(b) - f(a)}{b - a}$

Where

$(a,b) = (2,4)$

So, we have:

$Rate = \frac{f(4) - f(2)}{4 - 2}$

$Rate = \frac{f(4) - f(2)}{2}$

Using the attached graph, we have:

$f(2) = 4$

$f(4) = 16$

So, we have:

$Rate = \frac{16- 4}{2}$

$Rate = \frac{12}{2}$

$Rate = 6$

4 0

3 years ago

Is (4, 3) a solution of the graphed inequality?

Maurinko [17]

No it is not. Anything in the shaded area is a solution m. (4,3) is not in the shaded area so it is not a solution for the graphed inequality.

7 0

3 years ago

8+ (-4)= ?<br><br>What does 8+ (-4) equal to?

Dafna1 [17]

Answer:

4

Step-by-step explanation:

When you add a positive number with a negative number, it technically turns into a subtraction equation. So, the easier way to look at the equation is 8-4=4

6 0

3 years ago

Read 2 more answers

Find the value of x for the given value of y. y=9−7x; y=37

MrMuchimi

Answer:

For y=37, x= -4

Step-by-step explanation:

We have to find the value of x, when y=37 is the given value for the given equation

$y=9-7x$

Putting the value of y=37 in the equation to find the 'x'

$y=9-7x$

$37=9-7x\\7x=9-37\\7x=-28\\x=-4$

So, for the value of y=37, the value of $x=-4$

6 0

3 years ago