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aleksandrvk [35]

2 years ago

10

In a certain chemical, the ratio of zinc to copper is 4 to 19. A jar of the chemical contains 646 grams of copper. How many gram

s of zinc does it contain?

1 answer:

klasskru [66]2 years ago

5 0

Chemical and enlargement of reduction in okay 12

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Beth has made 12 cupcakes.This is 30% of the cupcakes she must make.How many cupcakes must she make?

san4es73 [151]

12/3 = 4 30/3 =10% (4cupcakes is 10%)
4x10 = 40 10x10= 100 (40 cupcakes is 100%)

7 0

3 years ago

Read 2 more answers

Find x and y please

Alexandra [31]

Answer:

Answer:

x → 4.24
y → 4.24

Step-by-step explanation:

» x and y can only be got through using trigonometric ratios:

✍ <u> </u><u>For</u><u> </u><u>x</u><u> </u>:

${ \tt{ \sin( \theta) = \frac{opposite}{hypotenuse} }} \\ \\ { \tt{ \sin(45 \degree) = \frac{x}{6} }} \\ \\ { \tt{x = 6 \times \sin(45 \degree) }} \\ { \tt{x = 4.24}}$

✍ <u> </u><u>F</u><u>o</u><u>r</u><u> </u><u>y</u><u> </u>:

${ \tt{ \cos( \theta) = \frac{adjacent}{hypotenuse} }} \\ \\ { \tt{ \cos( 45 \degree) = \frac{y}{6} }} \\ \\ { \tt{y = 6 \times \cos(45 \degree) }} \\ { \tt{y = 4.24}}$

6 0

2 years ago

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How do you round 28.26 to the nearest square foot

scZoUnD [109]

28.26 is closest to 28 so you round 28.26 to 28, not 29.

8 0

3 years ago

ANSWER AND EXPLAIN PLEASE ILL MARK BRAINLIEST!!!!!!!!!!!

motikmotik

Answer:

x = 1 and y = -2

Step-by-step explanation:

Given that,

2x-3y = 8 ..(1)

4x+3y = -2 ..(2)

Add equation (1) and (2),

2x-3y+4x+3y = 8+(-2)

6x = 6

x = 1

Put the value of x in equation (1).

2-3y = 8

2-8 = 3y

-6 = 3y

y = -2

Hence, the value of x is 1 and that of y is -2.

3 0

2 years ago

Find the 11th term of the geometric sequence 6, -18, 54

Nataly [62]

I don’t feel like doing it but I we’ll tell you how to do it you multiply it by 3 so 6 x 3 equals 18 just in negative do 18 x 3 equal 54 so every other on is a negative it’s Simone

4 0

3 years ago