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11Alexandr11 [23.1K]
2 years ago
12

Let f(x) = -8x + 4 and g(x) = 3x2 + 5. Find f(7) + g(7) .

Mathematics
1 answer:
VMariaS [17]2 years ago
6 0

Answer:

-7

Step-by-step explanation:

substitute both x's for 7:

(-8(7)+4)+ (3(7)2+5)

= -54 + 47

= -7

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Whats the perimiter of the following rectangle? The side says x - 2 and the bottom says 2x + 1​
irakobra [83]

Answer:

6x-2

Step-by-step explanation:

The perimeter of a rectangle is found by

P = 2(l+w)

  =2( x-2 + 2x+1)

Combine like terms

P = 2(3x-1)

Distribute

P = 6x-2

8 0
3 years ago
Shannon is selling boxes cookies and candy for a fundraiser. She's sold each box of cookies for $5.25. She also sold one one box
defon

Answer:

The minimum boxes of cookies is 39

Step-by-step explanation:

Let

x ----> the number of boxes of cookies sold

y ----> the number of boxes of candies sold

we know that

The word "at least" means "greater than or equal to"

so

The inequality that represent this problem is

5.25x+8.75y\geq 200

The solution is the shaded area above the solid line   5.25x+8.75y=200

using a graphing tool

The solution is the shaded area -----> see the attached figure

Find out the minimum boxes of cookies needed to sell to reach the goal

assuming only cookies are sold

For y=0

5.25x+8.75(0)\geq 200

5.25x\geq 200

solve for x

x\geq 38.1

Round up

therefore

The minimum boxes of cookies is 39

5 0
3 years ago
5 friends need to split 4 candy bars how much does each friend get
Nady [450]

Answer: 4/5


Step-by-step explanation:

1. split each candy bar into fifths

2. 20 pieces total

3. 20 ÷ 5 = 4

4. So each person gets 4 pieces (4/5)


8 0
3 years ago
How do you multiply a fraction by a whole number
morpeh [17]
Assuming the +'s are actually x's  1/2 of 3 is 1.5 and 1.5 divided by 7 is 1.5/7.(answer is 1.5/7) hopefully I'm right.
4 0
3 years ago
100 points if u help
malfutka [58]

The answer is 87.12

Just check it once

6 0
3 years ago
Read 2 more answers
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