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r-ruslan [8.4K]
3 years ago
15

Simplify the expression 7(a-3+4b)

Mathematics
1 answer:
castortr0y [4]3 years ago
4 0

Answer:

7a - 21 + 28b

Step-by-step explanation:

using the distributive property we can multiply 7 to the numbers in the paretheses. doing this we get:

7a - 21 + 28b

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PLEASE HELP! Which table shows a proportional relationship between x and y?
Inga [223]
I’m pretty sure that it is the 3 or C option.
5 0
3 years ago
lara has 90 mild peppers and 36 hot peppers. she is putting them into baskets so that each basket has the same number of mild pe
Mariulka [41]

Answer:

Up to 36

Step-by-step explanation:

If she puts one pepper hot pepper in every basket she can make a total of 36 baskets

8 0
3 years ago
Find the number b such that the line y = b divides the region bounded by the curves y = 36x2 and y = 25 into two regions with eq
Gemiola [76]

Answer:

b = 15.75

Step-by-step explanation:

Lets find the interception points of the curves

36 x² = 25

x² = 25/36 = 0.69444

|x| = √(25/36) = 5/6

thus the interception points are 5/6 and -5/6. By evaluating in 0, we can conclude that the curve y=25 is above the other curve and b should be between 0 and 25 (note that 0 is the smallest value of 36 x²).

The area of the bounded region is given by the integral

\int\limits^{5/6}_{-5/6} {(25-36 \, x^2)} \, dx = (25x - 12 \, x^3)\, |_{x=-5/6}^{x=5/6} = 25*5/6 - 12*(5/6)^3 - (25*(-5/6) - 12*(-5/6)^3) = 250/9

The whole region has an area of 250/9. We need b such as the area of the region below the curve y =b and above y=36x^2 is 125/9. The region would be bounded by the points z and -z, for certain z (this is for the symmetry). Also for the symmetry, this region can be splitted into 2 regions with equal area: between -z and 0, and between 0 and z. The area between 0 and z should be 125/18. Note that 36 z² = b, then z = √b/6.

125/18 = \int\limits^{\sqrt{b}/6}_0 {(b - 36 \, x^2)} \, dx = (bx - 12 \, x^3)\, |_{x = 0}^{x=\sqrt{b}/6} = b^{1.5}/6 - b^{1.5}/18 = b^{1.5}/9

125/18 = b^{1.5}/9

b = (62.5²)^{1/3} = 15.75

8 0
3 years ago
HELP ASAPPPP NOWWW PLEASEEE
pickupchik [31]
X=0 because when you have something to the power of zero your answer is 1.
x=0 since 1 to the power of zero equals 1.


hope im not too late
5 0
3 years ago
Read 2 more answers
Explain the errors and write the correct answers. Gary converts kilograms to grams as shown: 4.25 kg = 4.25 x 100 = 425 grams
Andrej [43]

Answer:

Gary needed to multiply by 1000 instead of 100.

Step-by-step explanation:

The conversion from kilograms to grams is to multiply by 1000.

#teamtrees #WAP (Water And Plant)

3 0
3 years ago
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