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
sasho [114]
3 years ago
5

A system of equations is shown below: Equation A: 4c = d − 8 Equation B: c = 5d + 8 Which of the following steps should be perfo

rmed to eliminate variable d first?
A. Multiply equation B by 4
B. Multiply equation A by -5
C. Multiply equation A by 4
D. Multiply equation B by 5
Mathematics
1 answer:
Alchen [17]3 years ago
3 0
<span>Equation A: 4c = d − 8
</span><span>Equation B: c = 5d + 8 
</span>
Multiply Equation A by -5:
Equation A: - 20c = -5d + 40

Equation (1) + (2) :
-19c = 48

Answer: <span>B. Multiply equation A by -5</span>
You might be interested in
please please help me I have a test I need to take! Answer the following questions about the centroid of this triangle!!!!
maria [59]

Answer: I am sorta answering this on my alt, just move along

Step-by-step explanation:

The whole lenght is the short length 9 and the long length 18 added.

3 0
3 years ago
To make ribbon and bow for a hat, Stacey needs 5/6 yard of black ribbon and 2/3 yard of red ribbon. how much total ribbon does s
larisa86 [58]
First make the denominators of the fractions the same by multiplying.

\frac{2}{3} × \frac{2}{2}
=\frac{4}{6}

Now we just need to add the fractions together

\frac{5}{6} +  \frac{4}{6}
= \frac{9}{6}

9/6 would be the answer, but it can be simplified further, then converted into decimal form.

\frac{9}{6} ÷ \frac{3}{3}
=\frac{3}{2}
=1.5 yards

Your final answer is 1.5 yards of ribbon are needed.
7 0
3 years ago
Read 2 more answers
6b. Create a table that shows the relationship between the amount of
goblinko [34]

Answer:

120 x W = M

Step-by-step explanation:

If she makes 120 per week working then the number of the week she has work multiplied by 120 is her total for whichever week

8 0
2 years ago
The first number is 14 less than the second number. When she adds them, she gets 40.
Alenkinab [10]

Answer:

second number is 17, first number is 3

Step-by-step explanation:

5 0
3 years ago
A box has a volume of 192 cubic inches, a length that is twice as long as its width, and a height that is 2 inches greater than
ruslelena [56]

Answer:

Therefore the dimension of the cuboid is 8 inches×4 inches ×6 inches.

Step-by-step explanation:

Cuboid : A cuboid is a three dimension shape. The length ,breadth and height of a cuboid are not same.

  • A cuboid has 6 faces.
  • A cuboid contains 8 vertices.
  • A cuboid contains 12 edges .
  • The total surface area of a cuboid is

           = 2(length×breadth+breadth×height+length×height) square units

  • The dimension of a cuboid is written as length×breadth×height.
  • The volume is( length×breadth×height) cubic units

Given that the volume of the box is 192 cubic inches.

Let x inches be the width of the cuboid.

Since the length is twice as long as its width.

Then length = 2x inches

Again height is 2 inches longer than width.

Then height = (x+2) inches.

Therefore the volume of the cuboid is

=[x\times 2x\times (x+2)]   cubic inches

=[2x^2(x+2)]     cubic inches

=(2x^3+4x^2)     cubic inches

According to the problem,

2x^3+4x^2=192

\Rightarrow 2x^3+4x^2-192=0

\Rightarrow 2(x^3+2x^2-96)=0

\Rightarrow (x^3+2x^2-96)=0

\Rightarrow x^3-4x^2+6x^2-24x+24x-96=0

\Rightarrow x^2(x-4) +6x(x-4)+24(x-4)=0

\Rightarrow (x-4)(x^2+6x+24)=0

Therefore x=4

Since the all zeros of x²+6x+24 =0 is negative.

Therefore breadth = 4 inches

 length=(2×4) inches=8 inches

 and height = (4+2)inches = 6 inches.

Therefore the dimension of the cuboid is 8 inches×4 inches ×6 inches.

8 0
3 years ago
Other questions:
  • 1.63 in simplest form
    6·1 answer
  • What is the value of the expression shown below? 7 + (2 + 6) 2 ÷ 4 ⋅ (5 points) 23 18 9 8
    8·1 answer
  • If the pattern in the table is extended to represent more equivalent ratios for 2:6, which pair of numbers would be in the colum
    7·2 answers
  • Lisa swam one less than 4 times as many laps as amanda. Brynne swam 11 more laps than Amanda. If lisa &amp; brynne swam the same
    14·1 answer
  • For EASY BRAINLIEST!!! <br><br> Answer as many as you can !!
    12·1 answer
  • Find an equation for a line<br> perpendicular to y= 3x – 5 , with a y-<br> intercept of -2
    12·1 answer
  • Three integers x, y and z satisfy 34x+5ly=6z. If y and z are primes, find the
    14·1 answer
  • (03.04 LC)<br> Which of the following is a compound?<br> O Cl2<br> O H20<br> O He<br> O H₂
    9·1 answer
  • Find the midpoint of the segment with the end points(1 , 7) and (9, 0)
    5·1 answer
  • Pls help me ASAP!!will mark as brainlist
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!