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2 years ago

Solve the following equation to find the value of x: 2(x +3) =18

Mathematics

2 answers:

MatroZZZ [7]2 years ago

7 0

Answer:

x=3

Step-by-step explanation:

3+3=9

9x2= 18

serg [7]2 years ago

6 0

Answer:

Step-by-step explanation:

2(x+3)=18 : divide both sides by 2

x+3=9 :move constant to the right

x=9-3 :Subtract the numbers

x=6 :solution

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You need a 75 % alcohol solution. On hand, you have a 260 mL of a 30% alcohol mixture. You also have 95 % alcohol mixture . How

user100 [1]

$30 \: percent \: alcohol \: in \: 260 \: ml \\ alcohol = 0.3 \times 26 0= 78 \: ml$

$c( \gamma ) = \frac{78 + 0.95\gamma }{260 + \gamma } \times 100$

$c( \gamma ) = 75$

$\frac{78 + 0.95\gamma }{260 + \gamma } = 0.75$

$78 + 0.95\gamma = 0.75 \gamma + 195 \\ 0.2 \gamma = 117 \\ \gamma = 585$

$we \: need \: 585 \: ml \: of \: 95% \: alcohol$

6 0

1 year ago

Read 2 more answers

BRAINLY!!!- if a=7, b=8, and c=9.2 is this a right triangle? why?

Travka [436]

Answer:

Step-by-step explanation:

If this were a right triangle we would assume the Pythagorean Theorem to prove it

$a^{2} +b^{2} =c^{2}$

$7^{2} +8^{2} =9.2^{2}$

this gives us

49+64=84.64

this is 143=84.64 and therefore not equal and not a right triangle

7 0

2 years ago

When is the sum of two negative mixed numbers an integer?

Alex_Xolod [135]

When the sum equals zero

3 0

3 years ago

What is the measure of ∠XZW?

tester [92]

95°.

Since the angle inside of a triangle equal 180° we need to find the angles inside of the triangle. The two angles on a line add up to 180° or are supplementary, so we can find the inside angle x by doing 180-150=30°.

Now that we know inside x is 30, if we add 30+65, we get 95, and 180-95=85°. Then to find angle xzw, just do 180-85 to get 95°.

Hope this helps :)

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3 years ago

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If 1/4 of the 7th graders got an A on the test and 2/5 of them got a B, that fraction of the students got an A or B?

posledela

Answer: $\dfrac{13}{20}$