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2 years ago

Please helppp!!! Meee

Mathematics

2 answers:

ella [17]2 years ago

6 0

The awnser was -x^2-4

TEA [102]2 years ago

5 0

Answer:

The answer is D

Step-by-step explanation:

You are welcome !

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0.|4| in a fraction (simplify)

abruzzese [7]

Answer:

2/5

Step-by-step explanation:

7 0

3 years ago

Step 1: 1x-21+3=7 step 2: 1x-21=7-3 step 3: 1x-21=4 what would the next step be to solve equation

IgorC [24]

Add 21 to both sides

6 0

3 years ago

A map of the park can be divided into a grid of 9^2 equal sections of land. It is estimated that there are 9^6 ants per section

kenny6666 [7]

Answer:

9^8

Step-by-step explanation:

The total number of ants is

(total number of sections)(ants in each section).

let x be the total number of ants.

Substitute the given values.

x = (9^2)(9^6)

x = 9^(2+6) <= exponent rule: when multiplying exponents with the same base, add the exponents.

x = 9^8

4 0

3 years ago

A metalworker has a metal alloy that is 15% copper and another alloy that is 75% copper. How many kilograms of each alloy shou

lisov135 [29]

48 kilograms of 15 % copper is combined with 72 kilograms of 75 % copper to create 120 kg of a 51% copper alloy

Solution:

Let "x" be the kilograms of 15 % copper

Then, (120 - x) be the kilograms of 75 % copper

Then, according to question,

"x" kilograms of 15 % copper is combined with (120 - x) kilograms of 75 % copper to create 120 kg of a 51% copper alloy

Thus we frame a equation as:

15 % of x + 75 % of (120 - x) = 51 % of 120

Solve the equation for "x"

$15 \% \times x + 75 \% \times (120-x) = 51 \% \times 120\\\\\frac{15}{100} \times x + \frac{75}{100} \times (120-x) = \frac{51}{100} \times 120\\\\0.15x + 0.75(120-x) = 0.51 \times 120\\\\0.15x + 90 - 0.75x = 61.2\\\\0.6x = 90 - 61.2\\\\0.6x = 28.8\\\\Divide\ both\ sides\ by\ 0.6\\\\x = 48$

Thus 48 kilograms of 15 % copper used

Then, (120 - x) = (120 - 48) = 72

Thus, 72 kilograms of 75 % copper is used

4 0

2 years ago

Evaluate: a-2b/c : if a = -8, b = 6.5, and c = -2. -1.5 10.5 -9

Mkey [24]

The answer to ur equation is -1.5

3 0

3 years ago

Read 2 more answers