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3 years ago

Help with Questions 4 and 5! Will mark Brainliest for the best and accurate answers!

Mathematics

2 answers:

qaws [65]3 years ago

7 0

question 4 is A

question 5 is 43.6

question 5 showing work

how I would figure it out is 151-20 =131

then I would divide it by 3 for each day

131÷3=43.6

cestrela7 [59]3 years ago

4 0

Answer:

131÷3=43.6

Step-by-step explanation:

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sixteen men working 9 hrs a day can complete a pice of work in 14 days .How many more men working 7 hrs a day would complete the

nordsb [41]

Answer:

8 more men are needed to complete the job

Step-by-step explanation:

Proportions

This problem can be solved by step-by-step reasoning applying proportions:

16 men working 9 hrs a day complete the job in 14 days
16 men working 1 hr a day complete the job in 14*9 days

The above statement stands because the fewer hours of work, the more time the job needs to be completed. Let's continue.

1 man working 1 hr a day complete the job in 14*9*16 days

The same reasoning applies here, fewer men=more days.

Now for the second condition. Increase the hours/day:

1 man working 7 hrs a day complete the job in 14*9*16/7 days

More hours/day=less days to complete the job

x men working 7 hrs a day complete the job in 14*9*16/(7*x) days

We know this last time is 12 days, thus:

$\displaystyle 12=\frac{14*9*16}{7*x}$

Solving for x:

$\displaystyle x=\frac{14*9*16}{7*12}=\frac{2016}{84}=24$

24 men are needed now, this is an increase of 24-16=8 more men

8 more men are needed to complete the job

7 0

3 years ago

What is the value of c in the equation below?

Rudik [331]

Answer:

Step-by-step explanation:

Using the rules of exponents

$a^{m}$ × $a^{n}$ = $a^{(m+n)}$ and $a^{-m}$ = $\frac{1}{a^{m} }$

Given

$2^{-4}$ × 2² = $2^{(-4+2)}$ = $2^{-2}$ = c , hence

c = $2^{-2}$ = $\frac{1}{2^{2} }$ = $\frac{1}{4}$ → D

4 0

3 years ago

Read 2 more answers

Write h(x)=x2-6x + 3 in vertex form

Anna007 [38]

Answer: The vertex form is h(x)=(x-3)^2-6

Step-by-step explanation:

Using the complete the square method, first complete any squares

X^2-6x+(-3)^2-(-3)^2+3

Use the binomial formula

(x-3)^2 - (-3)^2 +3

Simplify

(x-3)^2-6

7 0

3 years ago

The equations y = 2x - 5 and y = \sqrt{3x - 1} are graphed on the coordinate grid.

skad [1K]

Answer:

B) 1

Step-by-step explanation:

We can see that the equation has only one real solution since both sides only intersect at that one point (4,3).

4 0

3 years ago

Read 2 more answers

1. Solve the following equations for x:

worty [1.4K]

Answer:

A. X=-12
B. X=102
C. X=44
D. X=15

Step-by-step explanation:

Isolate the term of x from one side of the equation.

First, add by 9 from both sides.

x-9+9=-21+9

Solve.

-21+9=-12

X=-12

Switch sides.

x+10=112

Subtract by 10 from both sides.

x+10-10=112-10

Solve.

112-10=102

X=102

Switch sides.

x-30=14

Add by 30 from both sides.

x-30+30=14+30

Solve.

x=44

Switch sides.

x-12=3

Add by 12 from both sides.

x-12+12=3+12

Solve.

Add the numbers from left to right.

3+12=15

x=15

Therefore, the correct answer is part A: x=-12, part B: x=102, part C: x=44, and part D: x=15.

I hope this helps you! Let me know if my answer is wrong or not.

6 0

2 years ago