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nata0808 [166]
3 years ago
9

Someone please help me with these 2 problems :(

Mathematics
1 answer:
k0ka [10]3 years ago
7 0
If the discriminant b^2-4ac is 0, then you have TWO EQUAL, REAL ROOTS.

If you're given the x-intercepts, you can determine the factors of the polynomial as follows:   Take -3, change the sign and write (x+3).  Take 5, change the sign and write (x-5).  Then the eq'n of the parabola is

f(x) = (x+3)(x-5) = x^2 - 2x -15, in which a=1, b = -2 and c= -15.

You can find the x-coordinate of the vertex, which is also the equation of the axis of symmetry, using

x= -b / (2a).    Here, x = -(-2) / (2[1]), or  x = 1

Find the y-coordinate by subbing 1 for x in the equation above:

y = (1)^2 - 2(1) - 15  =  1 - 2 - 15  =  -16

The vertex is at (1, -16) and the equation of the axis of symm. is x = 1.
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Frank's toy car is 19 centimeters long. Max's
jeka94

Answer:

Pertaining to the yielded interrogate, the retort is 6.30.

Step-by-step explanation:

As disseminated, the terms may equate to the proximate as identified:

-If an inch is equivalent to the numeral equivalence of 2.54, hence 5 inches (in) is in the accordance with the equivalence to 12.7 centimeters (cm).

Alas, the terms may equate as the following:

19 cm - 12.7 cm = x

Thus, as to resolute and evaluate the retort, with respect to your interrogate, is 6.30.

*Hope this helps.

8 0
3 years ago
Read 2 more answers
Which of the following systems describes the graph ?
Gnoma [55]

Answer:

x > -3 and y ≥ 1/2x - 2

Step-by-step explanation:

blue line = x > -3

red line = pass (0, -2) (4, 0)

y = 1/2x - 2

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7 0
1 year ago
A train travels 150 miles in 3 hours. At this same rate, how many miles will it travel in 8 hours?
Dahasolnce [82]

Answer:

400 miles

Step-by-step explanation:

150/3 = 50, 50 * 8 = 400

3 0
2 years ago
A clothing store pays $89.47 for a dress. The store’s percent of markup is 50% and the tax is 7.6%. Find the selling price for t
Goryan [66]
Hi,
<span>SP=Selling Price
</span>CP of dress= $ 89.47
percent of mark up = 50%
SP without tax= 100+ mark up % /100 * CP
<span>SP without tax= 100+50/100 * 89.47
</span>SP without tax= 150/100 * 89.47
SP without tax= 1.5 * 89.47
<span>SP without tax= $ 134.205
</span>tot. SP(SP with tax)= 100 + tax %/100 * SP
<span>SP=100 + 7.6/100 * 134.205
</span>SP= 107.6/100 * 134.205
SP= 1.076 * 134.205
<span>SP=  $144.40458
Hope this helps you.</span>
3 0
3 years ago
Solve 4x+ 1 = 1 and show steps as well
Mice21 [21]
4x+1=1
    -1=-1
4x=0
4x/4=4/0
x=4


please can i have a brainliest
8 0
3 years ago
Read 2 more answers
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