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
AnnZ [28]
3 years ago
12

Can anyone please help me with problems 81, 83, and 86? PLeASE and THaNK YOU!

Mathematics
1 answer:
IgorC [24]3 years ago
8 0
81.
x \times 1.5 + x \times 2.5 +  \frac{x}{2}  \times 4 + ( \frac{x}{2}  + 1) \times 3 = 78 \\ 4 \times x + 4 \times  \frac{x}{2}  + 3 \times  \frac{x}{2}  + 3 = 78 \\ 4 \times x + 7 \times  \frac{x}{2}  = 75
multiply everything with 2
8 \times x + 7 \times x = 150 \\ 15 \times x = 150 \\ x =  \frac{150}{15}  \\ x = 10

x is the number of 1.50 and 2.50 wrenches he bought. do the calculations for the rest of them

83.
(x  + 2)\times  \frac{1}{4}  + x \times  \frac{1}{2}  = 11.75
multiply with 4
x + 2 + 2 \times x = 47 \\ 3 \times x = 47 - 2 \\ 3 \times x = 45 \\ x =  \frac{45}{3}  \\ x = 15
x is the amount of half dollars in the pile of coins. do the calculations for the quarters.

86.
3 \times x + 2 \times x + x = 24 \\ 6 \times x = 24 \\ x =  \frac{24}{6}  \\ x = 4
x is the amount of peaches cans, do the calculations for the rest.
You might be interested in
Which rate is the lowest price? <br> $6.30 for 9 <br> $5.50 for 5 <br> $4.20 for 7 <br> $0.80 each
Sedbober [7]
Answer: $4.20 for 7
This problem can be solved by dividing the pay by the number of items.

$6.30 / 9 = $0.70
$5.50 / 5 = $1.10
$4.20 / 7 = $0.60
$0.80 / 1 = $0.80

This shows that for the third option, $4.20 for 7, the rate per item is the lowest.
7 0
3 years ago
If f(x) = x2 + x, find f(-3).<br><br> A. -12<br> B. 3<br> C. 6
Alex17521 [72]

C.


-3 squared is 9. 9 + (-3) is 6.


Therefore, it's C

4 0
3 years ago
Read 2 more answers
Write a proportion for each of the diagrams below and solve for the missing value.
Sphinxa [80]

Answer:

y=6

Step-by-step explanation:

\frac{4}{8} =\frac{3}{y}

4y=24

y=6

6 0
2 years ago
The perimeter of triangle ABC is 32 find the lengths of AC and AB​
Nutka1998 [239]

The lengths of AC and AB​ are each 10.6 units.

<u>Step-by-step explanation</u>:

Perimeter of a triangle = Sum of all the three sides of a triangle

  • Perimeter = 3a
  • where, a is the length of the each sides of a triangle.

⇒ 32 = 3a

⇒ a = 32/3

⇒ a = 10.6

6 0
3 years ago
Vector v has a direction of (-4,27) find the direction angle for v
mixas84 [53]
\bf \begin{array}{lclll}&#10;\ \textless \ &-4&,&27\ \textgreater \ \\&#10;&\uparrow &&\uparrow \\&#10;&a&&b&#10;\end{array}\qquad tan(\theta)=\cfrac{b}{a}\implies \measuredangle \theta=tan^{-1}\left( \frac{b}{a} \right)&#10;\\\\\\&#10;\measuredangle \theta=tan^{-1}\left( \frac{27}{-4} \right)
8 0
3 years ago
Other questions:
  • A $7000 investment earns $1330 simple interest in two years. What is the annual interest rate? A. 1.90% B. 3.80% C. 9.50% D. 19.
    15·1 answer
  • 20 points !!!
    9·2 answers
  • A pen cost $.59.how much would a dozen pens cost
    15·2 answers
  • Dustin has a collection of quarters and pennies the total value is $4.65 there are 33 coins how many quarters and pennies does h
    11·1 answer
  • Which function is the inverse of f Superscript negative 1 Baseline (x) = negative one-half x minus three-halves?
    9·2 answers
  • Ashton is thinking of a number. When she divides it by 7, she gets a quotient of 7.35. What number is Ashton thinking of?
    9·2 answers
  • There are 49 dogs signed up to compete in the dog show. There are 36 more small dogs than large dogs signed up to compete. How m
    14·1 answer
  • There are 12 sixth graders, 11 seventh
    12·1 answer
  • Figure 2 was constructed using figure 1. For the transformation to be defined as a rotation, which statements must be true? Sele
    12·1 answer
  • Somebody please help meee!!!!
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!