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Kamila [148]
2 years ago
7

Try This question solve using substitution I’ll give you brainliest

Mathematics
2 answers:
Semmy [17]2 years ago
4 0

Answer:

(-4, -3)

Step-by-step explanation:

First divide the second equation by -1. It becomes y = -3x - 15.

Then, substitute this equation into the y of the first equation.

x + 2(-3x - 15) = -10

x - 6x - 30 = -10

-5x = 20

x = -4

Then substitute the x value into the equation x + 2y = -10

-4 + 2y = -10

2y = -6

y = -3

Drupady [299]2 years ago
4 0

Answer: (-4,-3)

Step-by-step explanation:

(-4)+2*(-3)=-10

-4-6=-10

-10=-10 True

-(-3)=3*(-4)+15

3=-12+15

3=3 True

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Yesterday, 20 guests at a hotel called for room service, and 60 guests did not call for room service. What percentage of the gue
Neko [114]

33.3% is the answer, I think

20/60 ---> 1/3, covert this to a percentage and it equals 33.3%

6 0
2 years ago
At the baseball stadium, the price for popcorn is $5.88 for 3 bags. If you want to buy 7 bags of popcorn, how much will it cost?
4vir4ik [10]
The answer will be $13.72 for 7 bags of popcorn.

to find this answer, you first take 5.88 and divide it by 3 to find out how much one bag costs.

the answer to 5.88/3 is 1.96, so you multiply 1.96 by 7 to get the answer of how much 7 bags of popcorn will cost.

hope this helps!
4 0
2 years ago
Read 2 more answers
HELP Sam measures the height of 7 different scoops of ice cream. The mean of the heights was 3.8 cm. Which of the following best
OLga [1]

Sam measures the height of 7 different scoops of ice cream. The mean height was 3.8 cm. If all the scoops are evenly distributed, they would all be 3.8 cm tall.

<h3>How to find the mean value of a data set?</h3>

The mean value of the data set is the ratio of the sum of the data set's values to the number of values it has.

If the data set consists of values

x_1, x_2, ..., x_n

, then we get the mean value as:

\overline{x} = \dfrac{x_1 + x_2 + \cdots + x_n}{n}

Sam measures the height of 7 different scoops of ice cream. The mean height was 3.8 cm.

\overline{x} = \dfrac{x_1 + x_2 + \cdots + x_n}{n}

mean=\dfrac{(a+b+c+d+e+f+g)}{7}

Therefore, If all the scoops are evenly distributed, they would all be 3.8 cm tall.

Learn more about mean;

brainly.com/question/23008823

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8 0
2 years ago
Read 2 more answers
According to postal regulations, a carton is classified as "oversized" if the sum of its height and girth (the perimeter of its
Amanda [17]

Answer:

V(max) =  8712.07 in³

Dimensions:

x (side of the square base)  = 16.33 in

girth   = 65.32 in

height = 32.67 in

Step-by-step explanation:

Let

x  = side of the square base

h = the height of the postal

Then according to problem statement we have:

girth = 4*x     (perimeter of the base)

and

4* x  +  h  = 98  (at the most)   so   h = 98 - 4x  (1)

Then

V = x²*h

V = x²* ( 98 - 4x)

V(x) = 98*x² - 4x³

Taking dervatives (both menbers of the equation we have:

V´(x)  =  196 x   -  12 x²        ⇒   V´(x) = 0

196x - 12x²  = 0   first root of the equation  x = 0

Then   196 -12x = 0      12x = 196     x = 196/12

x = 16,33 in      ⇒    girth = 4 * (16.33)       ⇒ girth = 65.32 in

and from equation (1)

y = 98 - 4x       ⇒  y = 98 -4 (16,33)

y = 32.67 in

and maximun volume of a carton V is

V(max) = (16,33)²* 32,67

V(max) = 8712.07 in³

3 0
3 years ago
If P(not A) = 0.18 and P(A and B) = 0.44, what is P(B given A)?
pickupchik [31]

p(not A)=0.18

p(A&B)= 0.44

A= 0.44- 0.18

  = 0.26

P(B given A)= 0.26+0.18+0.44

                    =0.7

3 0
2 years ago
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