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Helga [31]
3 years ago
13

Keiko is mixing 4 cups of concrete to make a stepping stone. She needs 1.5 cups of sand and 2.5 cups of cement mix. Which statem

ent best describes how much of each ingredient Keiko needs to measure? A. Keiko should make it easy and just measure about 1 cup of sand and 3 cups of cement mix since she needs a total of 4 cups. B. Keiko should measure exactly 1.5 cups of sand and 2.5 cups of cement mix to be sure the concrete will set properly. C. Keiko should make it easy and just measure about 2 cups of each since she needs a total of 4 cups.
Mathematics
1 answer:
Charra [1.4K]3 years ago
8 0
Ur answer would be B.. Hope it helps let me know if its right or not!
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(xy + 2x2y – x2 + 6x3) – (2xy – 6x2y + 4x2 – 6x3) – ( – 2x3 + x2y) + ( – x3 + 4xy + 3x2y – 2x2)
Mazyrski [523]

Answer: =-2(xy-6y-5)

Step-by-step explanation: multiply -(2xy-6 x 2y+ 4 x 2 -6 x 3) remove the parenthesis -2xy + 12 y - 8 +18 calculate -2xy+12y-8+18 factor the expression -2xy + 12y + 10 solution -2 (xy- 6y-5)

3 0
3 years ago
Find the probability that when a couple has four ​children, at least one of them is a girl. ​(Assume that boys and girls are equ
AveGali [126]

Answer:

0.9375 = 93.75% probability that at least one of the four children is a girl.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

We have the following sample space

In which b means boy, g means girl

b - b - b - b

b - b - b - g

b - b - g - b

b - b - g - g

b - g - b - b

b - g - b - g

b - g - g - b

b - g - g - g

g - b - b - b

g - b - b - g

g - b - g - b

g - b - g - g

g - g - b - b

g - g - b - g

g - g - g - b

g - g - g - g

Total outcomes

There are 16 total outcomes(size of the sample space)

Desired outcomes

Of these outcomes, only 1(b - b - b - b) there is not a girl.

So the number of desired outcomes is 15.

Probability:

P = \frac{15}{16} = 0.9375

0.9375 = 93.75% probability that at least one of the four children is a girl.

7 0
3 years ago
Write 2/3 as a decimal.
Mekhanik [1.2K]

Answer:

0.67

Step-by-step explanation:

2/3 = 0.6666

0.6666 rounded to the nearest hundredth = 0.67

3 0
3 years ago
James is framing a rectangular print for art class and needs to know the perimeter. The length of the print is 24 inches and the
ollegr [7]

Answer:

84

Step-by-step explanation:

Given,

Length of the print(l) = 24 inches

Width of the print(b) = 18 inches

Perimeter of the print(P)= ?

We know,

Perimeter of the print(P) = 2(l + b)

= 2(24 + 18)

= 2(42)

=84 inches^2

5 0
3 years ago
Can i please get help with this question?
docker41 [41]
The area is 60 and the lenght is 7 times longer than the width which is (w+7) and the formula is l×w=A, and the answer is
w(w+7)=60
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3 years ago
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