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AURORKA [14]
3 years ago
12

What is the value of y when x = 4? y=15x+7

Mathematics
1 answer:
Nana76 [90]3 years ago
3 0

Answer: Y= 67

Step-by-step explanation:

The equation says;

Y= 15x + 7

When x=4

We have Y= 15(4)+7 by substituting the value of x for the equation. So, we have

Y=60+7

Y= 67

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Can someone plsss help :)
OLga [1]
Set equal to eachother
(2x+1) = 79
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2x=78
Divide 2 from both sides
2x/2=78/2
X= 39
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What is the distance between 182 and 265 on a number line?
adoni [48]
265-182=83
the answer is b.
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2 years ago
1. Delia purchased a new car for $23,350. This make and model straight line depreciates to zero after 13 years.
frosja888 [35]

Answer:

a. y-intercept = 23350 and x-intercept = 13

b. m = -\frac{23350}{13}

c. y = -\frac{23350}{13}x + 23350

Step-by-step explanation:

Given

Years = 13

Total\ depreciation = \$23350

Solving (a): The x and y intercepts

The y intercept is the initial depreciation value

i.e. when x = 0

This value is the value of the car when it was initially purchased.

Hence, the y-intercept = 23350

The x intercept is the year it takes to finish depreciating

i.e. when y = 0

From the question, we understand that it takes 13 years for the car to totally get depreciated.

Hence, the x-intercept = 13

Solving (b): The slope

The slope (m) is the rate of depreciation per year

This is calculated by dividing the total depreciation by the duration.

So:

m = \frac{23350}{13}

Because it is depreciation, it means the slope represents a deduction.

So,

m = -\frac{23350}{13}

Solving (c): The straight line equation

The general format of an equation is:

y = mx + b

Where

m = slope

b = y\ intercept

In (a), we have that:

y\ intercept = 23350

In (b), we have that:

Slope\ (m) = -\frac{23350}{13}

Substitute these values in y = mx + b

y = -\frac{23350}{13}x + 23350

<em>Hence, the depreciation equation is: </em>y = -\frac{23350}{13}x + 23350<em></em>

8 0
2 years ago
Help pleaseeeeeeeeeeee
Amiraneli [1.4K]

volume = \pi \times  {r}^{2} \times h \\ volume = 3.142 \times (10 \div 2)^{2} \times 18 \\ volume \:  = 3.142 \times 25 \times 18 \\ volume = 1413.9{cm}^{3}

price =  \frac{1413.9 \times 0.02}{10}  = 2.8278 = 2.83 \: dollars

7 0
2 years ago
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