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4 years ago

Solve the equation: 7x=42.

2 answers:

8 0

To solve this equation, you need to find the value of x. Because you currently have the value of x × 7, you need to divide it by 7 to find the value of x.

7x ÷ 7 = x
Whatever you do to one side of the equation, you must do to the other, so
42 ÷ 7 = 6.

If you divide both sides by 7, you get x = 6 which is the final answer.

Solnce55 [7]4 years ago

7 0

First, we need to see what operation is being applied to 7 and x.
The operation that is being applied is multiplication.

Since the inverse operation of multiplication is division, we have to apply that to both sides of the equation.

7x=42
7x/7=42/7

7 and 7 cross out, and we are left with x on one side of the equation.

x=42/7
x=6

Our final answer is that x=6

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Step-by-step explanation:

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3 years ago

PLEASE HELP ASAP 9TH GRADE MATH AND I NEED HELP, 15 POINTS AND BRAINLIST HELPPPP

Sunny_sXe [5.5K]

Answer:

x = 40°

Step-by-step explanation:

Given that ∠SRT ≅ ∠STR

Then ∠STR = 20

∠STR and ∠STU are what you call supplementary angles. This means that the sum of their measurements is equal to 180° because they form a straight line.

So if:

∠STR + ∠STU = 180°

m∠STU = 4x

m∠STR = 20

Then:

4x + 20° = 180°

Now we solve for x:

$4x + 20 = 180\\\\Subtract\;20\;from\;both\;sides\;of\;the\;equation\\\\4x + 20 - 20 = 180 - 20\\4x = 160\\\\Divide\;both\;sides\;of\;the\;equation\;by\;4\\\\\dfrac{4x}{4}=\dfrac{160}{4}\\\\x = 40$

x = 40°

8 0

3 years ago

(1 2/7-3/14)/8/15trying to remember how to do this

SOVA2 [1]

We will write it as a fraction in ordet to solve, that is:

$\frac{(1\frac{2}{7}-\frac{3}{14})}{(\frac{8}{15})}$

We then operate as follows:

$\frac{((\frac{7}{7}+\frac{2}{7})-\frac{3}{14})}{(\frac{8}{15})}\Rightarrow\frac{(\frac{9}{7}-\frac{3}{14})}{(\frac{8}{15})}\Rightarrow\frac{(\frac{15}{14})}{(\frac{8}{15})}\Rightarrow\frac{15\cdot15}{14\cdot8}\Rightarrow\frac{225}{112}$

We have this, since 1 integer will be equal as a numerator divided by a denominator with equal values. Examples 1 = 2/2, 1 = 45/45, ...

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2 years ago

156 rounded to the nearest hundred is?

aliina [53]

200 because 156 is closer to 200 than 100

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3 years ago

1) In how many ways can a girl choose a two-piece outfit from 9 blouses and 8 skirts?

julsineya [31]

D. There are 9 blouse options and 8 skirt options. So, for each of the 9 blouses, there are 8 skirt options. Multiply 9x8, which equals 72

8 0

3 years ago