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stepladder [879]
3 years ago
10

Jack's baby sister crawled three and five tenths meters today.which number represents that distance?

Mathematics
1 answer:
BaLLatris [955]3 years ago
8 0
5 is the answer because it is a full number
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For the following pair of functions, find (f+g)(x) and (f-g)(x).
ch4aika [34]

Given:

The functions are

f(x)=4x^2+7x-5

g(x)=-9x^2+4x-13

To find:

The functions (f+g)(x) and (f-g)(x).

Solution:

We know that,

(f+g)(x)=f(x)+g(x)

(f+g)(x)=4x^2+7x-5-9x^2+4x-13

(f+g)(x)=(4x^2-9x^2)+(7x+4x)+(-5-13)

(f+g)(x)=-5x^2+11x-18

And,

(f-g)(x)=f(x)-g(x)

(f-g)(x)=(4x^2+7x-5)-(-9x^2+4x-13)

(f+g)(x)=4x^2+7x-5+9x^2-4x+13

(f+g)(x)=(4x^2+9x^2)+(7x-4x)+(-5+13)

(f-g)(x)=13x^2+3x+8

Therefore, the required functions are (f+g)(x)=-5x^2+11x-18

and (f-g)(x)=13x^2+3x+8.

7 0
3 years ago
Solve for r. 5(r - 10) = -51 Enter the answer in the box.​
ANTONII [103]
5(r - 10) = -51
= 5r - 50 = -51
= 5r = -51 + 50
= 5r = -1
= r = -1/5

r = -0.2
7 0
2 years ago
There are 140 legs on a planet zids have 5 legs and zods have 7 legs h=how many soulutions are there
abruzzese [7]
Number of zids=x
number of zods=y
number of zid legs=5x
number of zod legs=7y

so
5x+7y=140
try to get it into slope intercept from so you can graph is (y=mx+b)
5x+7y=140
subtract 5x from both sides
7y=140-5x
divide both sides by 7
y=20-5/7x
y=-5/7x+20

plug in numbers for x and get numbers for y (you can only plug in multiples of 7 for x so that there are a whole number of zids and since you are counting, x and y must never be negative)

lets try 0 for x

y=-5/7(0)+20
y=20
 so x=0 and y=20 is an answer (if you can have only one of that species)


lets try 7 for x
y=-5/7(7)+20
y=-5+20
y=15

so x=7 and y=15 is an answer


lets try 14 for x

y=-5/7(14)+20
y=-10+20
y=10

so x=14 and y=10 is another answer


lets try 21 for x
y=-5/7(21)+20
y=-15+20
y=5

so x=21 and y=5 is another answer


lets try 28 for x
y=-5/7(28)-20
y=-20+20
y=0

so x=28 and y=0 is an answer (if there can be only one of a species)


if we go further, then y will be negative so the answers are

(x,y)
(0,20)
(7,15)
(14,10)
(21,5)
(28,0)

if it is allowed that only one species exists then there are 5 possible answers
if both must exist simultaneously, then there are only 3 answers
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8 0
3 years ago
I need help with finding the equations of a line!!!
Dvinal [7]
M = Y / X

m = [1 - (-2) ] / [2 - (-2)]

m = (1+2) / (2+2)

m = 3 / 4

Using (2,1)

y - yo = m (x-xo)

y - 1 = 3/4 (x-2)

Or

(-2,-2)

y + 2 = 3/4 (x+2)

D and F
7 0
3 years ago
Kevin and Conner are selling subs and sandwiches for a fundraiser. Kevin sold 25 subs and 18 sandwiches for a total of $209.50.
AleksandrR [38]

Answer:

1 sub = $5.50; 1 sandwich = $4.00

Step-by-step explanation:

You can solve this using a matrix and solving using reduced row-echelon form.

5 0
2 years ago
Read 2 more answers
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