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alex41 [277]
3 years ago
7

The sum of 2 times a number and 4 equals 3 HELP ASAP

Mathematics
2 answers:
Olegator [25]3 years ago
7 0

Answer:

-1/2

Step-by-step explanation:

you have to make it like this and use a variable:

2<u><em>x</em></u>+4=3

take away 4 from both sides:

2<em><u>x</u></em>= -1

divide by 2:

<u><em>x</em></u> = -1/2

AlexFokin [52]3 years ago
5 0

Answer:

The number is - ½

Step-by-step explanation:

Let the missing number be x

2x + 4 = 3

2x = 3 - 4

2x = - 1

x = - ½

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A student answered 86 problems on a test correctly and received a grade of 98%. How many problems were on the test, if all the p
balu736 [363]

Answer:

88 problems

Step-by-step explanation:

Set this problem up as fractions

86/x = 98/100

Cross multiply

86 × 100 = x × 98

8600 = 98x

Divide both sides by 98

87.75... = x

Round to nearest whole number

87.75 rounds up to 88

88 problems

7 0
3 years ago
Solve for h.<br> 15.3 + 1 h =1.3- 1 h
Iteru [2.4K]

Answer:

-7 = h

Step-by-step explanation:

15.3 + 1h = 1.3 - 1h

<u>         +1h          +1h</u>

15.3 + 2h = 1.3

Remember what you do to one side you MUST do to the other.

 15.3 + 2h = 1.3

<u>-15.3           -15.3</u>

2h = -14

Now to isolate the variable you divide both sides by 2 to get, h = -7

Hope that helps and have a great day!

6 0
3 years ago
Read 2 more answers
Graph h(x)= -4(x-3)(x-1)
ExtremeBDS [4]

Answer:

roots (1,0) (3,) the vertical intercept is (0,-12)

Step-by-step explanation:

5 0
1 year ago
a buret is a tool designed to transfer precise amounts of liquid .A buret initially contains 70.00 millimeters of a solution and
katrin [286]

Let:

Vbu= Volume of the buret

Vbk= Volume of the beaker

A buret initially contains 70.00 millimeters of a solution and a beaker initially contains 20.00 ml of the solution the buret drips solution into the Beaker. each drip contains 0.05 mL of solution, therefore:

x = Number of drips

a = volume of each drip

\begin{gathered} Vbu=70-ax \\ Vbk=20+ax \\ \text{where:} \\ a=0.05 \\ Vbu=70-0.05x \\ Vbk=20+0.05x \end{gathered}

after how many drips will the volume of the solution in the buret and beaker be equal ?​ Vbu = Vbk:

\begin{gathered} Vbu=Vbk \\ 70-0.05x=20+0.05x \\ \text{Solve for x:} \\ 0.1x=70-20 \\ 0.1x=50 \\ x=\frac{50}{0.1} \\ x=500 \end{gathered}

5 0
1 year ago
The histogram shows the weekly attendance of participants in a school's study skills program. What was the highest weekly attend
worty [1.4K]

That would be on the 5th week. There were 18 students that attended (D.)

Hope this helped!

8 0
3 years ago
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