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ad-work [718]
3 years ago
13

Find value of x and y 4.)2x-3y=-15 x=4y

Mathematics
2 answers:
Thepotemich [5.8K]3 years ago
8 0
\left\{\begin{array}{ccc}2x-3y=-15\\x=4y\end{array}\right\\\\substitute\\\\2\cdot4y-3y=-15\\8y-3y=-15\\5y=-15\ \ \ \ \ |both\ sides\ :5\\y=-3\\\\x=4\cdot(-3)=-12\\\\Solution:x=-12\ and\ y=-3.
bija089 [108]3 years ago
8 0
2x - 3y = -15
x = 4y
substitute x frm eq2 to eq1
2 (4y) - 3y = -15
8y - 3y = -15
5y = - 15
y = -3
substitute y in eq2
x = 4(-3)
x = -12
y = -3 , x = -12
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Is 1/2 greater than 4/5
Law Incorporation [45]
For this question you should know:
1/2 = 5/10 
and 
4/5 = 8/10 
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4 0
3 years ago
Olivia bought a beach towel for $9.95
horsena [70]

Answer:

$23.41

Step-by-step explanation:

Add the cost of each item together.

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And there may have been sales tax as well but this information was not provided so it is not needed in the answer.

8 0
3 years ago
Find the 8th term for the series 2, 8, 32, 128, … <br> A. 8192<br> B. 16384<br> C. 6784<br> D. 32768
GenaCL600 [577]

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So we have to multiply by 4

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7 0
3 years ago
Anyone help please!!!!
Andre45 [30]
We are to verify the identity:

cos(α-B)-cos(α+B) = 2 sinα sinβ

Left hand side = cos(α - B)-cos(α + B) 

= cosα cosβ + sinα sinB - (cosα cosB - sinα sinβ)

= cosα cosβ + sinα sinB - cosα cosB + sinα sinβ)

= sinα sinβ + sinα sinβ

= 2 sinα sinβ

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6 0
3 years ago
Read 2 more answers
Professional plumbers suggest that a sewer pipe should be sloped 0.25 inch for every foot. find the recommended slope for a sewe
erik [133]

We have been given that professional plumbers suggest that a sewer pipe should be sloped 0.25 inch for every foot.

Therefore, we can find the slope as:

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\text{Slope}=\frac{0.25}{12}=\frac{25}{1200}=\frac{1}{48}

Therefore, the recommended slope for a sewer pipe is \frac{1}{48}


5 0
2 years ago
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