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
Kisachek [45]
3 years ago
14

5x + 7 = 42, Is x = 7 the solution for this equation? Justify your answer for it is or it is not

Mathematics
2 answers:
Doss [256]3 years ago
7 0

Answer:

7 is a solution.

Step-by-step explanation:

Step 1: Write equation

5x + 7 = 42

Step 2: Solve for <em>x</em>

  1. Subtract 7 on both sides: 5x = 35
  2. Divide both sides by 5: x =7
tigry1 [53]3 years ago
7 0

Answer:

<h2>x = 7</h2><h2 />

Step-by-step explanation:

5x + 7 = 42

5x = 42 - 7

x = 35 / 5

x = 7

You might be interested in
Tom bought a soft drink for 3 dollars and 6 candy bars he spent a total of 21 dollars how much did each candy bar cost
stiv31 [10]

Answer:

Each candy bar was $3

Step-by-step explanation:

You subtract the 3 dollar soda from the total to find out how much he spent on candy bars all together.Then, you divide that number by how many candy bars he purchased, 6 to get your answer, $3

5 0
3 years ago
Read 2 more answers
Find the solution set. |x|= 9<br> A. { }<br> B. {-3 , 3}<br> C. { -9, 9}<br> D. {-81, 81}
Ierofanga [76]

Answer:

C. { -9, 9}

Step-by-step explanation:

An absolute value equation has 2 solutions, a positive and a negative

|x|= 9

x= +9  and x = -9

4 0
3 years ago
Read 2 more answers
Shandra's parents put $1,500 in her bank account for college tuition. At an interest rate
gavmur [86]

Answer:

$6,427.99

Step-by-step explanation:

-We first find the effective annual interest rate as follows:

i_m=(1+i/m)^m-1\\\\=(1+0.0825/2)^2-1\\\\=0.084202

#We the use this rate to find the compounded amount after 18 years:

A=P(1+i_m)^n\\\\=1500(1.084202)^{18}\\\\=6427.99

Hence, the amount after 18 years is $6,427.99

5 0
3 years ago
A particular style of sunglasses costs the retailer $70 $⁢70 per pair. At what price should the retailer mark them so he can sel
Alexxx [7]

After the 10% discount on marked price (P), the selling price is ...

... P×(100% -10%) = 0.90P

After a markup off 35% on cost, the value is

... $70×(100% +35%) = 1.35×$70 = $94.50

The retailer wants these two values to be equal:

... 0.90P = $94.50

... P = $94.50/0.90 = $105.00 . . . . . divide by the coefficient of P

The marked price should be $105.00.

6 0
3 years ago
Can someone help me please?
Rainbow [258]

Answer:

the first option is correct

since value of a will be found through division.

7 0
2 years ago
Read 2 more answers
Other questions:
  • Which number produces a rational number when added to 0.6?
    9·2 answers
  • Select the correct answer. The number of oranges purchased varies directly as the price of the oranges. If 11 oranges cost $2.35
    12·2 answers
  • I need help with this won plz help
    8·2 answers
  • Find the area of the shaded region​
    5·1 answer
  • If y(x) = 2x-5, then f(4) is A. 17 B.5 C.4 D.3​
    12·1 answer
  • Hi help hi help hi help in the picture
    8·2 answers
  • If a+b=6, then what is the value of 2a + 2bl
    10·1 answer
  • Kacy is on her freshman volleyball team.she makes 31%of her foul shots,leading her team to 14 wins in 19 games of the season. If
    7·1 answer
  • Simplify by combining like terms and then FACTOR the expression -3+5y+5+3y
    14·1 answer
  • If x =root 7+root5 and y=root7-root5 find xy​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!