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Alla [95]
3 years ago
12

Help me please brainly

Mathematics
1 answer:
3241004551 [841]3 years ago
6 0

Step-by-step explanation:

1)

3x+3

2)

10+2x

3)

8x+24

4)

8a+8b+8c

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A triangle has a height that is 2 inches more than three times the base and an area of 60 in. Find the base and the height of th
const2013 [10]

Answer:

Height = 20, Base = 6

Step-by-step explanation:

The area of a triangle is \frac{bh}{2}

where b is the base and h is the height

H = 3B + 2\\\frac{B(3B + 2)}{2}=60\\\\3B^2 + 2B = 120\\3B^2+2B - 120=0\\

We can factor by grouping

3B^2 - 18B + 20B - 120 = 0\\3B(B - 6) + 20(B-6) = 0\\GCF the (B-6)\\(B-6)(3B+20)=0\\B = 6, B = \frac{-20}{3}

Length can only be positive, so we know that the base is 6 in

The height must be 2 + 3(6) = 20

Height = 20, Base = 6

8 0
3 years ago
You plan to purchase a bike costing $795. write an equation that could be used to find the amount m, that you must save per mont
Galina-37 [17]
Let
m-------> <span>the amount that you must save per month

we know that
total cost of a bike=$795
5*m=795----------> equation </span><span>that could be used to find the amount m
divide by 5 both sides
m=795/5
m=$159

the answer is
</span>the equation that could be used to find the amount m is
<span>5m=795

</span>
6 0
3 years ago
Two families are vacationing together, driving in separate cars. the harris family averages 45 mph, leaving hometown 6 minutes a
Kobotan [32]

Let x = amount of time the Arlen family must catch up to overtake the Harris family

In principle, the Harris and the Arlen family should cover the same distance. Since distance is speed x time,

45 (6+y) = 58y

270 + 45y = 58y

58y - 45y = 270

y = 270 ÷ 13

y= 20.77min

7 0
3 years ago
The cost of 28 pounds horse feed is 63.28 what is the per pound of horse feed
Bas_tet [7]
$2.26 pounds of horse feed
8 0
3 years ago
The table show the age in years of employees in a company
adelina 88 [10]

Answer:

A. 24 ≤ a < 26.

B. 22.5

Step-by-step explanation:

A. Determination of the modal class interval.

Mode is the class with the highest frequency.

From the table given above, the highest frequency is 8, therefore the class will the highest frequency is:

24 ≤ a < 26.

B. To obtain the mean, we must determine the class mark. This is illustrated below:

Class >>>>> class mark >>> frequency

18 – 19 >>>> 18.5 >>>>>>>>> 3

20 – 21 >>> 20.5 >>>>>>>> 2

22 – 23 >>> 22.5 >>>>>>>> 7

24 – 25 >>> 24.5 >>>>>>>> 8

26 >>>>>>>> 26 >>>>>>>>> 0

The mean is given by the summation of the product of the class mark and frequency divided by the total frequency. This is illustrated below:

Mean = [(18.5x3) + (20.5x2) + (22.5x7) + (24.5x8) + (26x0)] / (3+2+7+8+0)

Mean = (55.5 + 41 + 157.5 + 196 + 0)/20

Mean = 450/20

Mean = 22.5

Therefore, the mean age is 22.5

4 0
3 years ago
Read 2 more answers
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