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3 years ago

Simplify the expression: 2 = (a + 5) =

Mathematics

1 answer:

Levart [38]3 years ago

4 0

Answer:

a+7

Step-by-step explanation:

Iria made a scaled copy of the following triangle. She used a scale factor greater than 111.

What could be the length of the base of the scaled copy of the triangle?

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State the slope of a line parallel to <br> y = 3.75

Alex73 [517]

m = 0

Step-by-step explanation:

If it's written in y =mx + c form, x is 0 and so is m.

Thus, m should be 0

8 0

4 years ago

how much mg of a metal containing 4% silver must be combined with 11 mg of a metal containing 38% silver to form an alloy contai

Eddi Din [679]

Answer:

6 mg of the metal needs to be added.

Step-by-step explanation:

Let the amount (in mg) of metal that needs to be added by y.

Therefore, the amount of silver in the above metal is 0.04y.

Prior to mixing, 11 mg of a metal contained 38% of silver (Given).

Therefore, the amount of silver before= $\frac{38}{100}*11$ = 4.18 mg

The total amount of silver after mixing, 4.18 + 0.04y mg

The total amount of metal after mixing, 11 + y mg

New percentage of silver = 26% .

Thus, $\frac{4.18+0.04y}{11+y}*100= 26$

$(4.18 +0.04 y) * 100 = 26 *(11 +y)$

$418+4y=286+26y$

$132=22y$

y=6 mg

Therefore, the amount of metal that needs to be added is 6 mg.

5 0

3 years ago

A number plus itself, plus twice itslef, plus 4 times itself, is equal to -104. what is the number?

Nutka1998 [239]

Let's represent this unknown number with the variable 'n'
n + n + 2n + 4n = -104

Explanations:
'n+n' - a number plus itself
'+2n' - plus twice itself
'+4n' - plus 4 times itself

Anyway:
n + n + 2n + 4n = -104
Simplify:
8n = -104
Divide both sides by 8:
n = -13

The number is -13
Good luck! If you need me to explain something in more depth, just ask :))
-T.B.

8 0

3 years ago

(PLEASE ANSWER + 10 POINTS!!)

Burka [1]

A^2 + b^2 = c^2

297^2 + 394^2 = C^2

88209+155236=243445

take the square root of 243445

you get 493.4

which in your answer they're rounded

so your answer is

C. 493

3 0

4 years ago

Read 2 more answers

If the 4th term of an A.P is 11 and sum of 4th and 5th term is 25. Find the common difference?

ira [324]

Answer:

$3$