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Lostsunrise [7]
3 years ago
12

Factor completely: 2a2 + a - 28

Mathematics
1 answer:
Vikki [24]3 years ago
7 0
2 a² + a - 28 = 
= 2 a² + 8 a - 7 a - 28 =
= 2 a ( a + 4 ) - 7 ( a + 4 ) =
= ( a + 4 ) ( 2 a - 7 )
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There are 4 red marbles and 8 green marbles in a box. If Emma randomly selects a marble from the box, what is the probability of
murzikaleks [220]

Answer:

The probability of a successful event is the ratio of the number of successful events to the total number of events. In this case, a successful event is selecting a red marble from the box. The total number of events is the total number of marbles in the box:

Red marbles/Total number of marbles

4/12 divide

=1/3

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3 years ago
Which graphs show continuous data?<br> Select each correct answer.
Nikolay [14]

Answer:

I say the first graph in the first pic

Also,the 2nd graph in the 2nd pic

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2 years ago
Read 2 more answers
After a reflection, can A=A'?
motikmotik
NO It can not!

Reason: the reason is because since both are the same , it will equal the mostly 0! So it wouldn’t make sense. So no!

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4 0
3 years ago
Victor was having a hard time deciding which new vehicle he should buy. He decided to make the final decision based on the gas e
Amanda [17]

Answer:

Victor should buy Legend because it has a better unit rate

<em></em>

Step-by-step explanation:

See attachment for complete question.

To determine which car has more gas efficiency, we have to calculate the slope of each car.

Vehicle 1: Legend

Take any two corresponding points from the table

(x_1,y_1) = (4,72)

(x_2,y_2) = (12,216)

The slope is then calculated using;

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{216 - 72}{12 - 4}

m = \frac{144}{8}

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<em>This implies that this vehicle (legend) travels 18 miles per gallon of gas</em>

Vehicle 2: Supreme

Take any two corresponding points from the graph

(x_1,y_1) = (0,0)

(x_2,y_2) = (15,250)

The slope is then calculated using;

m = \frac{y_2 - y_1}{x_2 - x_1}

m = \frac{250 - 0}{15 - 0}

m = \frac{250}{15}

m = 16.7

This implies that this vehicle (supreme) travels 16.7 miles per gallon of gas

<em>Base on the calculations above, Victor should buy Legend because it has a better unit rate</em>

6 0
2 years ago
Ginny earned $49.50 for 6 hours of gardening and $38.60 for 4 hours of babysitting. For which job did she earn more money per ho
Reil [10]
Well you first need to multiply 49.50 times 6 which equals $297. Then $ 38.60 times 4 which equals $154.4. Ginny earned more money for gardening. She got $161.6 more money than in babysitting. I answered this by multiplying the money and hours. And also to see how much more I added the amounts of money for each job Ginny Works for if I did this wrong plz tell me
7 0
3 years ago
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