1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nalin [4]
3 years ago
7

How many solutions does the system of equations have?

Mathematics
1 answer:
SIZIF [17.4K]3 years ago
8 0
The answer is d) none because substituting -1/4x + 5/3 for y in the first equation gives 3x - 3x + 5/3 = 20 so 5/3 = 20 which is not true. 
You might be interested in
A construction company showed that the strength, y, of concrete, measured
Vilka [71]

Answer:

  a) y-intercept = 17; initial design strength percentage

  b) slope = 2.8; increase in that percentage each day

  c) 29.6 days to 100% design strength

Step-by-step explanation:

a, b) The equation is in the form called "slope-intercept form."

  y = mx + b

where the slope is m, and the y-intercept is b.

Your equation has a slope of 2.8 and a y-intercept of 17.

The y-intercept is the percentage of design strength reached 0 days after the concrete is poured. The strength of the concrete when poured is 17% of its design strength.

The slope is the percentage of design strength added each day after the concrete is poured. The concrete increases its strength by 2.8% of its design strength each day after it is poured.

__

c) To find when 100% of design strength is reached, we need to solve for x:

  100 = 2.8x +17

  83 = 2.8x

  83/2.8 = x ≈ 29.6

The concrete will reach 100 percent of its design strength in about 30 days.

8 0
3 years ago
Write an equivalent exponential equation for the following three problems.
Naily [24]

<u>Answer with step-by-step explanation:</u>

We are given three different expressions and we are to write an equivalent exponential equation for them.

We know that the standard form of a logarithmic expression is given by:

y = log_a ( x ) which is equivalent to the exponential form  x = a ^ y.

1. log _ {10} (0.1) = -1 ---> 10^{-1}=0.1

2. log _ {3} 9 = 2 ---> 3^2=9

3. log _ 5 ( \frac { 1 } { \sqrt { 5 } } ) = -\frac { 1 } { 2 } ---> 5^{-\frac{1}{2} }=\frac{1}{\sqrt{5} }

8 0
3 years ago
Solve <br> 7x + 6 &lt; -22 need help asap!
VLD [36.1K]

Answer:

x<−4

Step-by-step explanation:

7x+6<-22

7x+6-6<-22-6

7x<-28

7x/7<-28/7

x<-4

Hope it helped!

4 0
3 years ago
Read 2 more answers
Solve the equation C=2πr for π
postnew [5]
C = 2πr   Divide both sides by 2r
\frac{C}{2r} = π   Switch the sides to make it easier to read
π = <span>\frac{C}{2r}</span>
7 0
3 years ago
Read 2 more answers
J=UC solve for c please​
mart [117]

»»————- ★ ————-««

I believe your answer is:  

c=\frac{j}{u}; u\neq 0

»»————- ★ ————-««  

Here’s why:  

⸻⸻⸻⸻

\boxed{\text{Solving for 'c'...}}}\\\\j = uc  \\------------\\\rightarrow \frac{j=uc}{u}\\\\\rightarrow \frac{j}{u}=c\\\\\rightarrow \boxed{c=\frac{j}{u}}}; u\neq 0

⸻⸻⸻⸻

»»————- ★ ————-««  

Hope this helps you. I apologize if it’s incorrect.  

8 0
3 years ago
Other questions:
  • 1.33 divide 3.14 times 512
    14·2 answers
  • When the Bureau of Labor Statistics conducts a survey, it begins by partitioning the United States adult population into 2,007 g
    11·1 answer
  • A.
    7·1 answer
  • Prove that (a-b) x (a+b)=2a x b is true.<br> (a and b are vectors)
    11·2 answers
  • WHOEVER ANSWERS RIGHT WILL GET BRAINLIST
    12·2 answers
  • What is the value of x in the equation 5(3x + 4) = 23?
    11·2 answers
  • Kylie recorded the number of squats she could do on each day of her training.
    14·1 answer
  • Solve quadratic inequality x^2+4x≥0
    14·1 answer
  • Twenty students are standing in line to buy food at a football game. The first three students
    8·2 answers
  • Four students share 7 sandwiches equally. How much of a sandwich does each student get
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!