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Viefleur [7K]
3 years ago
9

I don’t understand these 3 questions and I need help.

Mathematics
2 answers:
rjkz [21]3 years ago
6 0
Not sure about the first one but the second one is option c (or -3). You just have to factor and find the solutions (so it would be -7 and 4 and then u just add them)

For question 39 the answer is c
Y_Kistochka [10]3 years ago
4 0

Answer:

1: A=1

2: -3

3: C

Step-by-step explanation:

1: If 3x+4 is a factor, then -4/3 is equal to x. Substitute it in for x and solve for a.  This gives us A=1.

For the commenter not understanding how I got -4/3: 3x+4 being a factor means that it equals 0. It might help you understand this if you remember that after factoring, like I did for 38 in my photo, we take expressions like x-4 and set them equal to 0 to get x=4, a solution. So, subtract 4 from both sides to get 3x=-4, then divide both sides by 3 to get x alone. Thus, x=-4/3.

2: To find the sum, we first need to find the two solutions. We can factor to get (x+7)(x-4). This gives us x=-7 and x=+4. The solution of these two would be (-7)+4 is -3.

3: B is a close answer, but the signs are wrong on the bottom. Factoring the question would give us 2(x-2) / 2(x^2-x-2). Factoring that equation is 2(x-2) / 2(x+1)(x-2). Simplifying this gives us 1 / x+1.

Sorry for the bad penmanship, I wanted to make it a little clearer for you! I really hope I helped! :)

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A red bus leaves a theme park every 24 minutes and a blue bus leaves the park every 20 minutes. they both leave the park at noon
earnstyle [38]

Answer:

2:00 PM

Step-by-step explanation:

20 = 2² × 5

4 0
3 years ago
Amelia used 666 liters of gasoline to drive 484848 kilometers.
Setler79 [48]

Answer:

<em> 728 km / lit</em>

Step-by-step explanation:

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4 0
3 years ago
Read 2 more answers
Determine if each equation is in standard form or slope- intercept form. 2x + y = 8 [ Select] [ Select] y = 58 23 &lt; [ Select]
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Answer:

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A car travels 2 5 8miles in 3 1 2minutes at a constant speed. Write an equation to represent the distance, d, that the car trave
pogonyaev

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258/312

Step-by-step explanation:

7 0
3 years ago
Help a fella out :)))))))
fomenos

Answer:

5280 ft/1 mi, 1848 ft

Step-by-step explanation:

Whatever unit is given on the top (miles), you will write it on the bottom of the second fraction. Since we are solving for length in feet, we know that the numerator will be in feet. The only answer choice that has this option is 5280 ft/ 1 mi. You can check this math by taking 0.35 of 5280 feet, or 1 mile = 1848 ft.

\frac{0.35 mi}{1} *\frac{?ft}{?mi}

\frac{0.35 mi}{1} *\frac{5280 ft}{1mi}        (miles cancels out, left with feet)

\frac{1848ft}{1}

1848 feet

I hope this helps!

4 0
2 years ago
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