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Vlad [161]
3 years ago
5

Find the area, seventh grade math problem please help

Mathematics
1 answer:
igor_vitrenko [27]3 years ago
6 0

Answer:

78 ft²

Step-by-step explanation:

A=\frac{a+b}{2} h

A=\frac{11+15}{2}6

78

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Find the simplified product:<br> sqrt 2x^2 * sqrt18^5
makvit [3.9K]

Answer:

1944x^2.

Step-by-step explanation:

sqrt 2x^2 * sqrt18^5

= sqrt2x^2 * (sqrt(9^5*2^5))

= sqrt 2 x^2 * (sqrt9^5 * sqrt 2^5)

= sqrt2 x^2 * (243* sqrt2^5)

= 2^0.5 (243 * 2^2.5) x^2

= 2^3 * 243 x^2

= 1944x^2.

5 0
2 years ago
Sue and Javier are working on a statistics project to estimate the proportion of students at their school who have a pet dog. Su
egoroff_w [7]

Answer:

the width of sue's interval will be narrower than javier's.

Step-by-step explanation:

in this problem, i do believe that sue's interval will be more narrow. in the formula,

p-hat ± \sqrt{phat(1-phat)/ n ,

a larger "n" value will lead to a smaller standard error. given that the population proportion is the same for both, and the sample size is the only difference, the standard error of sue's interval will be smaller than javier's, therefore making her whole confidence interval smaller.

again, i do believe this is correct, this is what i have in my AP stat notes. hope this helps!

6 0
3 years ago
Please help me<br> fast....
Likurg_2 [28]

Answer:

2^3 = 8

base = 2, main number in the exponential equation

exponent = 3, have to multiply the base 3 times by itself

power = 2^3, the whole equation

hope this helps!

Step-by-step explanation:

6 0
2 years ago
Gopal is thinking of a number. He says that the sum of the number and 8, mulltiplied by 3/4, is equal to -12. Which equations ca
inysia [295]

Answer:

D

Step-by-step explanation:

12X+8=-12

12×8

____=12

12

5 0
3 years ago
Read 2 more answers
Jessica ordered 10 bouquets of tulips, 4 bouquets of roses, and 6 bouquets of lilies for a total of $670. The combined cost to b
LUCKY_DIMON [66]

Answer:C

Step-by-step explanation:

Let x represent the cost of a bouquet of tulips.

Let y represent the cost of a bouquet of roses.

Let z represent the cost of a bouquet of lilies.

Jessica ordered 10 bouquets of tulips, 4 bouquets of roses, and 6 bouquets of lilies for a total of $670. This means that

10x + 4y + 6z = 670 - - - - - - - - - 1

The combined cost to buy one of each type of bouquet is $115. This means that

x + y + z = 115- - - - - - - - - 2

If a bouquet of lilies costs $5 more than a bouquet of tulips, it means that

z = x + 5 - - - - - - - - - 3

Substituting equation 3 into equation 1 and equation 2, it becomes

10x + 4y + 6(x+5)= 670

10x +4y + 6x + 30 = 670

16x + 4y = 670 - 30

16x + 4y = 640 = - - - - - - - - - 4

Substituting equation 3 into equation 2, it becomes

x + y + x + 5 =

2x + y = 115 - 5

2x + y = 110 - - - - - - - - - 5

Multiplying equation 5 by 4 , it becomes

8x + 4y = 440 - - - - - - - - - 6

Subtracting equation 6 from equation 4, it becomes

8x = 200

x = 200/8 = 25

2x + y = 110

2×25 + y = 110

50 + y = 110

y = 110 - 50 = 60

z = x + 5

z = 25 + 5 = 30

The cost of one bouquet of tulips is $25, one bouquet of roses is $60, and one bouquet of lilies is $30.

8 0
3 years ago
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